1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table
[] =
57 HOWTO(R_X86_64_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
58 bfd_elf_generic_reloc
, "R_X86_64_NONE", FALSE
, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_X86_64_64", FALSE
, MINUS_ONE
, MINUS_ONE
,
63 HOWTO(R_X86_64_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
64 bfd_elf_generic_reloc
, "R_X86_64_PC32", FALSE
, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
67 bfd_elf_generic_reloc
, "R_X86_64_GOT32", FALSE
, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
70 bfd_elf_generic_reloc
, "R_X86_64_PLT32", FALSE
, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_X86_64_COPY", FALSE
, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_X86_64_GLOB_DAT", FALSE
, MINUS_ONE
,
78 HOWTO(R_X86_64_JUMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_X86_64_JUMP_SLOT", FALSE
, MINUS_ONE
,
81 HOWTO(R_X86_64_RELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE", FALSE
, MINUS_ONE
,
84 HOWTO(R_X86_64_GOTPCREL
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
85 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL", FALSE
, 0xffffffff,
87 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
88 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
91 bfd_elf_generic_reloc
, "R_X86_64_32S", FALSE
, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_X86_64_16", FALSE
, 0xffff, 0xffff, FALSE
),
95 HOWTO(R_X86_64_PC16
,0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_X86_64_PC16", FALSE
, 0xffff, 0xffff, TRUE
),
97 HOWTO(R_X86_64_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_X86_64_8", FALSE
, 0xff, 0xff, FALSE
),
99 HOWTO(R_X86_64_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
100 bfd_elf_generic_reloc
, "R_X86_64_PC8", FALSE
, 0xff, 0xff, TRUE
),
101 HOWTO(R_X86_64_DTPMOD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_X86_64_DTPMOD64", FALSE
, MINUS_ONE
,
104 HOWTO(R_X86_64_DTPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF64", FALSE
, MINUS_ONE
,
107 HOWTO(R_X86_64_TPOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_X86_64_TPOFF64", FALSE
, MINUS_ONE
,
110 HOWTO(R_X86_64_TLSGD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_X86_64_TLSGD", FALSE
, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
114 bfd_elf_generic_reloc
, "R_X86_64_TLSLD", FALSE
, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
117 bfd_elf_generic_reloc
, "R_X86_64_DTPOFF32", FALSE
, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
120 bfd_elf_generic_reloc
, "R_X86_64_GOTTPOFF", FALSE
, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_signed
,
123 bfd_elf_generic_reloc
, "R_X86_64_TPOFF32", FALSE
, 0xffffffff,
125 HOWTO(R_X86_64_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_X86_64_PC64", FALSE
, MINUS_ONE
, MINUS_ONE
,
128 HOWTO(R_X86_64_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_X86_64_GOTOFF64",
130 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
131 HOWTO(R_X86_64_GOTPC32
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
132 bfd_elf_generic_reloc
, "R_X86_64_GOTPC32",
133 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
134 HOWTO(R_X86_64_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
135 bfd_elf_generic_reloc
, "R_X86_64_GOT64", FALSE
, MINUS_ONE
, MINUS_ONE
,
137 HOWTO(R_X86_64_GOTPCREL64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
138 bfd_elf_generic_reloc
, "R_X86_64_GOTPCREL64", FALSE
, MINUS_ONE
,
140 HOWTO(R_X86_64_GOTPC64
, 0, 4, 64, TRUE
, 0, complain_overflow_signed
,
141 bfd_elf_generic_reloc
, "R_X86_64_GOTPC64",
142 FALSE
, MINUS_ONE
, MINUS_ONE
, TRUE
),
143 HOWTO(R_X86_64_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
144 bfd_elf_generic_reloc
, "R_X86_64_GOTPLT64", FALSE
, MINUS_ONE
,
146 HOWTO(R_X86_64_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_signed
,
147 bfd_elf_generic_reloc
, "R_X86_64_PLTOFF64", FALSE
, MINUS_ONE
,
149 HOWTO(R_X86_64_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
150 bfd_elf_generic_reloc
, "R_X86_64_SIZE32", FALSE
, 0xffffffff, 0xffffffff,
152 HOWTO(R_X86_64_SIZE64
, 0, 4, 64, FALSE
, 0, complain_overflow_unsigned
,
153 bfd_elf_generic_reloc
, "R_X86_64_SIZE64", FALSE
, MINUS_ONE
, MINUS_ONE
,
155 HOWTO(R_X86_64_GOTPC32_TLSDESC
, 0, 2, 32, TRUE
, 0,
156 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE
, 0xffffffff, 0xffffffff, TRUE
),
159 HOWTO(R_X86_64_TLSDESC_CALL
, 0, 0, 0, FALSE
, 0,
160 complain_overflow_dont
, bfd_elf_generic_reloc
,
161 "R_X86_64_TLSDESC_CALL",
163 HOWTO(R_X86_64_TLSDESC
, 0, 4, 64, FALSE
, 0,
164 complain_overflow_bitfield
, bfd_elf_generic_reloc
,
166 FALSE
, MINUS_ONE
, MINUS_ONE
, FALSE
),
167 HOWTO(R_X86_64_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
168 bfd_elf_generic_reloc
, "R_X86_64_IRELATIVE", FALSE
, MINUS_ONE
,
170 HOWTO(R_X86_64_RELATIVE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
171 bfd_elf_generic_reloc
, "R_X86_64_RELATIVE64", FALSE
, MINUS_ONE
,
173 HOWTO(R_X86_64_PC32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
174 bfd_elf_generic_reloc
, "R_X86_64_PC32_BND", FALSE
, 0xffffffff, 0xffffffff,
176 HOWTO(R_X86_64_PLT32_BND
, 0, 2, 32, TRUE
, 0, complain_overflow_signed
,
177 bfd_elf_generic_reloc
, "R_X86_64_PLT32_BND", FALSE
, 0xffffffff, 0xffffffff,
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
184 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
185 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
187 /* GNU extension to record C++ vtable hierarchy. */
188 HOWTO (R_X86_64_GNU_VTINHERIT
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
189 NULL
, "R_X86_64_GNU_VTINHERIT", FALSE
, 0, 0, FALSE
),
191 /* GNU extension to record C++ vtable member usage. */
192 HOWTO (R_X86_64_GNU_VTENTRY
, 0, 4, 0, FALSE
, 0, complain_overflow_dont
,
193 _bfd_elf_rel_vtable_reloc_fn
, "R_X86_64_GNU_VTENTRY", FALSE
, 0, 0,
196 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
198 bfd_elf_generic_reloc
, "R_X86_64_32", FALSE
, 0xffffffff, 0xffffffff,
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val
;
213 unsigned char elf_reloc_val
;
216 static const struct elf_reloc_map x86_64_reloc_map
[] =
218 { BFD_RELOC_NONE
, R_X86_64_NONE
, },
219 { BFD_RELOC_64
, R_X86_64_64
, },
220 { BFD_RELOC_32_PCREL
, R_X86_64_PC32
, },
221 { BFD_RELOC_X86_64_GOT32
, R_X86_64_GOT32
,},
222 { BFD_RELOC_X86_64_PLT32
, R_X86_64_PLT32
,},
223 { BFD_RELOC_X86_64_COPY
, R_X86_64_COPY
, },
224 { BFD_RELOC_X86_64_GLOB_DAT
, R_X86_64_GLOB_DAT
, },
225 { BFD_RELOC_X86_64_JUMP_SLOT
, R_X86_64_JUMP_SLOT
, },
226 { BFD_RELOC_X86_64_RELATIVE
, R_X86_64_RELATIVE
, },
227 { BFD_RELOC_X86_64_GOTPCREL
, R_X86_64_GOTPCREL
, },
228 { BFD_RELOC_32
, R_X86_64_32
, },
229 { BFD_RELOC_X86_64_32S
, R_X86_64_32S
, },
230 { BFD_RELOC_16
, R_X86_64_16
, },
231 { BFD_RELOC_16_PCREL
, R_X86_64_PC16
, },
232 { BFD_RELOC_8
, R_X86_64_8
, },
233 { BFD_RELOC_8_PCREL
, R_X86_64_PC8
, },
234 { BFD_RELOC_X86_64_DTPMOD64
, R_X86_64_DTPMOD64
, },
235 { BFD_RELOC_X86_64_DTPOFF64
, R_X86_64_DTPOFF64
, },
236 { BFD_RELOC_X86_64_TPOFF64
, R_X86_64_TPOFF64
, },
237 { BFD_RELOC_X86_64_TLSGD
, R_X86_64_TLSGD
, },
238 { BFD_RELOC_X86_64_TLSLD
, R_X86_64_TLSLD
, },
239 { BFD_RELOC_X86_64_DTPOFF32
, R_X86_64_DTPOFF32
, },
240 { BFD_RELOC_X86_64_GOTTPOFF
, R_X86_64_GOTTPOFF
, },
241 { BFD_RELOC_X86_64_TPOFF32
, R_X86_64_TPOFF32
, },
242 { BFD_RELOC_64_PCREL
, R_X86_64_PC64
, },
243 { BFD_RELOC_X86_64_GOTOFF64
, R_X86_64_GOTOFF64
, },
244 { BFD_RELOC_X86_64_GOTPC32
, R_X86_64_GOTPC32
, },
245 { BFD_RELOC_X86_64_GOT64
, R_X86_64_GOT64
, },
246 { BFD_RELOC_X86_64_GOTPCREL64
,R_X86_64_GOTPCREL64
, },
247 { BFD_RELOC_X86_64_GOTPC64
, R_X86_64_GOTPC64
, },
248 { BFD_RELOC_X86_64_GOTPLT64
, R_X86_64_GOTPLT64
, },
249 { BFD_RELOC_X86_64_PLTOFF64
, R_X86_64_PLTOFF64
, },
250 { BFD_RELOC_SIZE32
, R_X86_64_SIZE32
, },
251 { BFD_RELOC_SIZE64
, R_X86_64_SIZE64
, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC
, R_X86_64_GOTPC32_TLSDESC
, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL
, R_X86_64_TLSDESC_CALL
, },
254 { BFD_RELOC_X86_64_TLSDESC
, R_X86_64_TLSDESC
, },
255 { BFD_RELOC_X86_64_IRELATIVE
, R_X86_64_IRELATIVE
, },
256 { BFD_RELOC_X86_64_PC32_BND
, R_X86_64_PC32_BND
,},
257 { BFD_RELOC_X86_64_PLT32_BND
, R_X86_64_PLT32_BND
,},
258 { BFD_RELOC_VTABLE_INHERIT
, R_X86_64_GNU_VTINHERIT
, },
259 { BFD_RELOC_VTABLE_ENTRY
, R_X86_64_GNU_VTENTRY
, },
262 static reloc_howto_type
*
263 elf_x86_64_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
267 if (r_type
== (unsigned int) R_X86_64_32
)
272 i
= ARRAY_SIZE (x86_64_elf_howto_table
) - 1;
274 else if (r_type
< (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type
>= (unsigned int) R_X86_64_max
)
277 if (r_type
>= (unsigned int) R_X86_64_standard
)
279 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
281 r_type
= R_X86_64_NONE
;
286 i
= r_type
- (unsigned int) R_X86_64_vt_offset
;
287 BFD_ASSERT (x86_64_elf_howto_table
[i
].type
== r_type
);
288 return &x86_64_elf_howto_table
[i
];
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type
*
293 elf_x86_64_reloc_type_lookup (bfd
*abfd
,
294 bfd_reloc_code_real_type code
)
298 for (i
= 0; i
< sizeof (x86_64_reloc_map
) / sizeof (struct elf_reloc_map
);
301 if (x86_64_reloc_map
[i
].bfd_reloc_val
== code
)
302 return elf_x86_64_rtype_to_howto (abfd
,
303 x86_64_reloc_map
[i
].elf_reloc_val
);
308 static reloc_howto_type
*
309 elf_x86_64_reloc_name_lookup (bfd
*abfd
,
314 if (!ABI_64_P (abfd
) && strcasecmp (r_name
, "R_X86_64_32") == 0)
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type
*reloc
318 = &x86_64_elf_howto_table
[ARRAY_SIZE (x86_64_elf_howto_table
) - 1];
319 BFD_ASSERT (reloc
->type
== (unsigned int) R_X86_64_32
);
323 for (i
= 0; i
< ARRAY_SIZE (x86_64_elf_howto_table
); i
++)
324 if (x86_64_elf_howto_table
[i
].name
!= NULL
325 && strcasecmp (x86_64_elf_howto_table
[i
].name
, r_name
) == 0)
326 return &x86_64_elf_howto_table
[i
];
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
334 elf_x86_64_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*cache_ptr
,
335 Elf_Internal_Rela
*dst
)
339 r_type
= ELF32_R_TYPE (dst
->r_info
);
340 cache_ptr
->howto
= elf_x86_64_rtype_to_howto (abfd
, r_type
);
341 BFD_ASSERT (r_type
== cache_ptr
->howto
->type
);
344 /* Support for core dump NOTE sections. */
346 elf_x86_64_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
351 switch (note
->descsz
)
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
358 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
361 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
371 elf_tdata (abfd
)->core
->signal
372 = bfd_get_16 (abfd
, note
->descdata
+ 12);
375 elf_tdata (abfd
)->core
->lwpid
376 = bfd_get_32 (abfd
, note
->descdata
+ 32);
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
387 size
, note
->descpos
+ offset
);
391 elf_x86_64_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
393 switch (note
->descsz
)
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd
)->core
->pid
400 = bfd_get_32 (abfd
, note
->descdata
+ 12);
401 elf_tdata (abfd
)->core
->program
402 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
403 elf_tdata (abfd
)->core
->command
404 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd
)->core
->pid
409 = bfd_get_32 (abfd
, note
->descdata
+ 24);
410 elf_tdata (abfd
)->core
->program
411 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
412 elf_tdata (abfd
)->core
->command
413 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
421 char *command
= elf_tdata (abfd
)->core
->command
;
422 int n
= strlen (command
);
424 if (0 < n
&& command
[n
- 1] == ' ')
425 command
[n
- 1] = '\0';
433 elf_x86_64_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
436 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
438 const char *fname
, *psargs
;
449 va_start (ap
, note_type
);
450 fname
= va_arg (ap
, const char *);
451 psargs
= va_arg (ap
, const char *);
454 if (bed
->s
->elfclass
== ELFCLASS32
)
457 memset (&data
, 0, sizeof (data
));
458 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
459 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
460 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
461 &data
, sizeof (data
));
466 memset (&data
, 0, sizeof (data
));
467 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
468 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
469 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
470 &data
, sizeof (data
));
475 va_start (ap
, note_type
);
476 pid
= va_arg (ap
, long);
477 cursig
= va_arg (ap
, int);
478 gregs
= va_arg (ap
, const void *);
481 if (bed
->s
->elfclass
== ELFCLASS32
)
483 if (bed
->elf_machine_code
== EM_X86_64
)
485 prstatusx32_t prstat
;
486 memset (&prstat
, 0, sizeof (prstat
));
488 prstat
.pr_cursig
= cursig
;
489 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
490 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
491 &prstat
, sizeof (prstat
));
496 memset (&prstat
, 0, sizeof (prstat
));
498 prstat
.pr_cursig
= cursig
;
499 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
500 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
501 &prstat
, sizeof (prstat
));
507 memset (&prstat
, 0, sizeof (prstat
));
509 prstat
.pr_cursig
= cursig
;
510 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
511 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
512 &prstat
, sizeof (prstat
));
519 /* Functions for the x86-64 ELF linker. */
521 /* The name of the dynamic interpreter. This is put in the .interp
524 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
525 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the global offset table. */
535 #define GOT_ENTRY_SIZE 8
537 /* The size in bytes of an entry in the procedure linkage table. */
539 #define PLT_ENTRY_SIZE 16
541 /* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
544 static const bfd_byte elf_x86_64_plt0_entry
[PLT_ENTRY_SIZE
] =
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
551 /* Subsequent entries in a procedure linkage table look like this. */
553 static const bfd_byte elf_x86_64_plt_entry
[PLT_ENTRY_SIZE
] =
555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
557 0x68, /* pushq immediate */
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
563 /* The first entry in a procedure linkage table with BND relocations
566 static const bfd_byte elf_x86_64_bnd_plt0_entry
[PLT_ENTRY_SIZE
] =
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
573 /* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
576 static const bfd_byte elf_x86_64_legacy_plt_entry
[PLT_ENTRY_SIZE
] =
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
583 /* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
586 static const bfd_byte elf_x86_64_bnd_plt_entry
[PLT_ENTRY_SIZE
] =
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
593 /* Entries for legacy branches in the second procedure linkage table
596 static const bfd_byte elf_x86_64_legacy_plt2_entry
[8] =
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
606 static const bfd_byte elf_x86_64_bnd_plt2_entry
[8] =
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
613 /* .eh_frame covering the .plt section. */
615 static const bfd_byte elf_x86_64_eh_frame_plt
[] =
617 #define PLT_CIE_LENGTH 20
618 #define PLT_FDE_LENGTH 36
619 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
630 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop
, DW_CFA_nop
,
634 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
648 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
649 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
652 /* Architecture-specific backend data for x86-64. */
654 struct elf_x86_64_backend_data
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte
*plt0_entry
;
658 const bfd_byte
*plt_entry
;
659 unsigned int plt_entry_size
; /* Size of each PLT entry. */
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset
;
663 unsigned int plt0_got2_offset
;
665 /* Offset of the end of the PC-relative instruction containing
667 unsigned int plt0_got2_insn_end
;
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size
;
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end
;
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset
;
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte
*eh_frame_plt
;
685 unsigned int eh_frame_plt_size
;
688 #define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
691 #define get_elf_x86_64_backend_data(abfd) \
692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
694 #define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
697 /* These are the standard parameters. */
698 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed
=
700 elf_x86_64_plt0_entry
, /* plt0_entry */
701 elf_x86_64_plt_entry
, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry
), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE
, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
716 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed
=
718 elf_x86_64_bnd_plt0_entry
, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry
, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry
), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt
, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt
), /* eh_frame_plt_size */
734 #define elf_backend_arch_data &elf_x86_64_arch_bed
736 /* x86-64 ELF linker hash entry. */
738 struct elf_x86_64_link_hash_entry
740 struct elf_link_hash_entry elf
;
742 /* Track dynamic relocs copied for this symbol. */
743 struct elf_dyn_relocs
*dyn_relocs
;
745 #define GOT_UNKNOWN 0
749 #define GOT_TLS_GDESC 4
750 #define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752 #define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754 #define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756 #define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
758 unsigned char tls_type
;
760 /* TRUE if a weak symbol with a real definition needs a copy reloc.
761 When there is a weak symbol with a real definition, the processor
762 independent code will have arranged for us to see the real
763 definition first. We need to copy the needs_copy bit from the
764 real definition and check it when allowing copy reloc in PIE. */
765 unsigned int needs_copy
: 1;
767 /* TRUE if symbol has at least one BND relocation. */
768 unsigned int has_bnd_reloc
: 1;
770 /* Information about the GOT PLT entry. Filled when there are both
771 GOT and PLT relocations against the same function. */
772 union gotplt_union plt_got
;
774 /* Information about the second PLT entry. Filled when has_bnd_reloc is
776 union gotplt_union plt_bnd
;
778 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
779 starting at the end of the jump table. */
783 #define elf_x86_64_hash_entry(ent) \
784 ((struct elf_x86_64_link_hash_entry *)(ent))
786 struct elf_x86_64_obj_tdata
788 struct elf_obj_tdata root
;
790 /* tls_type for each local got entry. */
791 char *local_got_tls_type
;
793 /* GOTPLT entries for TLS descriptors. */
794 bfd_vma
*local_tlsdesc_gotent
;
797 #define elf_x86_64_tdata(abfd) \
798 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
800 #define elf_x86_64_local_got_tls_type(abfd) \
801 (elf_x86_64_tdata (abfd)->local_got_tls_type)
803 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
804 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
806 #define is_x86_64_elf(bfd) \
807 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
808 && elf_tdata (bfd) != NULL \
809 && elf_object_id (bfd) == X86_64_ELF_DATA)
812 elf_x86_64_mkobject (bfd
*abfd
)
814 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_x86_64_obj_tdata
),
818 /* x86-64 ELF linker hash table. */
820 struct elf_x86_64_link_hash_table
822 struct elf_link_hash_table elf
;
824 /* Short-cuts to get to dynamic linker sections. */
827 asection
*plt_eh_frame
;
833 bfd_signed_vma refcount
;
837 /* The amount of space used by the jump slots in the GOT. */
838 bfd_vma sgotplt_jump_table_size
;
840 /* Small local sym cache. */
841 struct sym_cache sym_cache
;
843 bfd_vma (*r_info
) (bfd_vma
, bfd_vma
);
844 bfd_vma (*r_sym
) (bfd_vma
);
845 unsigned int pointer_r_type
;
846 const char *dynamic_interpreter
;
847 int dynamic_interpreter_size
;
849 /* _TLS_MODULE_BASE_ symbol. */
850 struct bfd_link_hash_entry
*tls_module_base
;
852 /* Used by local STT_GNU_IFUNC symbols. */
853 htab_t loc_hash_table
;
854 void * loc_hash_memory
;
856 /* The offset into splt of the PLT entry for the TLS descriptor
857 resolver. Special values are 0, if not necessary (or not found
858 to be necessary yet), and -1 if needed but not determined
861 /* The offset into sgot of the GOT entry used by the PLT entry
865 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
866 bfd_vma next_jump_slot_index
;
867 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
868 bfd_vma next_irelative_index
;
871 /* Get the x86-64 ELF linker hash table from a link_info structure. */
873 #define elf_x86_64_hash_table(p) \
874 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
875 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
877 #define elf_x86_64_compute_jump_table_size(htab) \
878 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
880 /* Create an entry in an x86-64 ELF linker hash table. */
882 static struct bfd_hash_entry
*
883 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
884 struct bfd_hash_table
*table
,
887 /* Allocate the structure if it has not already been allocated by a
891 entry
= (struct bfd_hash_entry
*)
892 bfd_hash_allocate (table
,
893 sizeof (struct elf_x86_64_link_hash_entry
));
898 /* Call the allocation method of the superclass. */
899 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
902 struct elf_x86_64_link_hash_entry
*eh
;
904 eh
= (struct elf_x86_64_link_hash_entry
*) entry
;
905 eh
->dyn_relocs
= NULL
;
906 eh
->tls_type
= GOT_UNKNOWN
;
908 eh
->has_bnd_reloc
= 0;
909 eh
->plt_bnd
.offset
= (bfd_vma
) -1;
910 eh
->plt_got
.offset
= (bfd_vma
) -1;
911 eh
->tlsdesc_got
= (bfd_vma
) -1;
917 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
918 for local symbol so that we can handle local STT_GNU_IFUNC symbols
919 as global symbol. We reuse indx and dynstr_index for local symbol
920 hash since they aren't used by global symbols in this backend. */
923 elf_x86_64_local_htab_hash (const void *ptr
)
925 struct elf_link_hash_entry
*h
926 = (struct elf_link_hash_entry
*) ptr
;
927 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
930 /* Compare local hash entries. */
933 elf_x86_64_local_htab_eq (const void *ptr1
, const void *ptr2
)
935 struct elf_link_hash_entry
*h1
936 = (struct elf_link_hash_entry
*) ptr1
;
937 struct elf_link_hash_entry
*h2
938 = (struct elf_link_hash_entry
*) ptr2
;
940 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
943 /* Find and/or create a hash entry for local symbol. */
945 static struct elf_link_hash_entry
*
946 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table
*htab
,
947 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
950 struct elf_x86_64_link_hash_entry e
, *ret
;
951 asection
*sec
= abfd
->sections
;
952 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
953 htab
->r_sym (rel
->r_info
));
956 e
.elf
.indx
= sec
->id
;
957 e
.elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
958 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
959 create
? INSERT
: NO_INSERT
);
966 ret
= (struct elf_x86_64_link_hash_entry
*) *slot
;
970 ret
= (struct elf_x86_64_link_hash_entry
*)
971 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
972 sizeof (struct elf_x86_64_link_hash_entry
));
975 memset (ret
, 0, sizeof (*ret
));
976 ret
->elf
.indx
= sec
->id
;
977 ret
->elf
.dynstr_index
= htab
->r_sym (rel
->r_info
);
978 ret
->elf
.dynindx
= -1;
979 ret
->plt_got
.offset
= (bfd_vma
) -1;
985 /* Destroy an X86-64 ELF linker hash table. */
988 elf_x86_64_link_hash_table_free (bfd
*obfd
)
990 struct elf_x86_64_link_hash_table
*htab
991 = (struct elf_x86_64_link_hash_table
*) obfd
->link
.hash
;
993 if (htab
->loc_hash_table
)
994 htab_delete (htab
->loc_hash_table
);
995 if (htab
->loc_hash_memory
)
996 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
997 _bfd_elf_link_hash_table_free (obfd
);
1000 /* Create an X86-64 ELF linker hash table. */
1002 static struct bfd_link_hash_table
*
1003 elf_x86_64_link_hash_table_create (bfd
*abfd
)
1005 struct elf_x86_64_link_hash_table
*ret
;
1006 bfd_size_type amt
= sizeof (struct elf_x86_64_link_hash_table
);
1008 ret
= (struct elf_x86_64_link_hash_table
*) bfd_zmalloc (amt
);
1012 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1013 elf_x86_64_link_hash_newfunc
,
1014 sizeof (struct elf_x86_64_link_hash_entry
),
1021 if (ABI_64_P (abfd
))
1023 ret
->r_info
= elf64_r_info
;
1024 ret
->r_sym
= elf64_r_sym
;
1025 ret
->pointer_r_type
= R_X86_64_64
;
1026 ret
->dynamic_interpreter
= ELF64_DYNAMIC_INTERPRETER
;
1027 ret
->dynamic_interpreter_size
= sizeof ELF64_DYNAMIC_INTERPRETER
;
1031 ret
->r_info
= elf32_r_info
;
1032 ret
->r_sym
= elf32_r_sym
;
1033 ret
->pointer_r_type
= R_X86_64_32
;
1034 ret
->dynamic_interpreter
= ELF32_DYNAMIC_INTERPRETER
;
1035 ret
->dynamic_interpreter_size
= sizeof ELF32_DYNAMIC_INTERPRETER
;
1038 ret
->loc_hash_table
= htab_try_create (1024,
1039 elf_x86_64_local_htab_hash
,
1040 elf_x86_64_local_htab_eq
,
1042 ret
->loc_hash_memory
= objalloc_create ();
1043 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1045 elf_x86_64_link_hash_table_free (abfd
);
1048 ret
->elf
.root
.hash_table_free
= elf_x86_64_link_hash_table_free
;
1050 return &ret
->elf
.root
;
1053 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1054 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1058 elf_x86_64_create_dynamic_sections (bfd
*dynobj
,
1059 struct bfd_link_info
*info
)
1061 struct elf_x86_64_link_hash_table
*htab
;
1063 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1066 htab
= elf_x86_64_hash_table (info
);
1070 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1074 if (info
->executable
)
1076 /* Always allow copy relocs for building executables. */
1077 asection
*s
= bfd_get_linker_section (dynobj
, ".rela.bss");
1080 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1081 s
= bfd_make_section_anyway_with_flags (dynobj
,
1083 (bed
->dynamic_sec_flags
1086 || ! bfd_set_section_alignment (dynobj
, s
,
1087 bed
->s
->log_file_align
))
1093 if (!info
->no_ld_generated_unwind_info
1094 && htab
->plt_eh_frame
== NULL
1095 && htab
->elf
.splt
!= NULL
)
1097 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1098 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED
);
1101 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1102 if (htab
->plt_eh_frame
== NULL
1103 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 3))
1109 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1112 elf_x86_64_copy_indirect_symbol (struct bfd_link_info
*info
,
1113 struct elf_link_hash_entry
*dir
,
1114 struct elf_link_hash_entry
*ind
)
1116 struct elf_x86_64_link_hash_entry
*edir
, *eind
;
1118 edir
= (struct elf_x86_64_link_hash_entry
*) dir
;
1119 eind
= (struct elf_x86_64_link_hash_entry
*) ind
;
1121 if (!edir
->has_bnd_reloc
)
1122 edir
->has_bnd_reloc
= eind
->has_bnd_reloc
;
1124 if (eind
->dyn_relocs
!= NULL
)
1126 if (edir
->dyn_relocs
!= NULL
)
1128 struct elf_dyn_relocs
**pp
;
1129 struct elf_dyn_relocs
*p
;
1131 /* Add reloc counts against the indirect sym to the direct sym
1132 list. Merge any entries against the same section. */
1133 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1135 struct elf_dyn_relocs
*q
;
1137 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1138 if (q
->sec
== p
->sec
)
1140 q
->pc_count
+= p
->pc_count
;
1141 q
->count
+= p
->count
;
1148 *pp
= edir
->dyn_relocs
;
1151 edir
->dyn_relocs
= eind
->dyn_relocs
;
1152 eind
->dyn_relocs
= NULL
;
1155 if (ind
->root
.type
== bfd_link_hash_indirect
1156 && dir
->got
.refcount
<= 0)
1158 edir
->tls_type
= eind
->tls_type
;
1159 eind
->tls_type
= GOT_UNKNOWN
;
1162 if (ELIMINATE_COPY_RELOCS
1163 && ind
->root
.type
!= bfd_link_hash_indirect
1164 && dir
->dynamic_adjusted
)
1166 /* If called to transfer flags for a weakdef during processing
1167 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1168 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1169 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1170 dir
->ref_regular
|= ind
->ref_regular
;
1171 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1172 dir
->needs_plt
|= ind
->needs_plt
;
1173 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1176 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1180 elf64_x86_64_elf_object_p (bfd
*abfd
)
1182 /* Set the right machine number for an x86-64 elf64 file. */
1183 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64
);
1188 elf32_x86_64_elf_object_p (bfd
*abfd
)
1190 /* Set the right machine number for an x86-64 elf32 file. */
1191 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32
);
1195 /* Return TRUE if the TLS access code sequence support transition
1199 elf_x86_64_check_tls_transition (bfd
*abfd
,
1200 struct bfd_link_info
*info
,
1203 Elf_Internal_Shdr
*symtab_hdr
,
1204 struct elf_link_hash_entry
**sym_hashes
,
1205 unsigned int r_type
,
1206 const Elf_Internal_Rela
*rel
,
1207 const Elf_Internal_Rela
*relend
)
1210 unsigned long r_symndx
;
1211 bfd_boolean largepic
= FALSE
;
1212 struct elf_link_hash_entry
*h
;
1214 struct elf_x86_64_link_hash_table
*htab
;
1216 /* Get the section contents. */
1217 if (contents
== NULL
)
1219 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1220 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1223 /* FIXME: How to better handle error condition? */
1224 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1227 /* Cache the section contents for elf_link_input_bfd. */
1228 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1232 htab
= elf_x86_64_hash_table (info
);
1233 offset
= rel
->r_offset
;
1236 case R_X86_64_TLSGD
:
1237 case R_X86_64_TLSLD
:
1238 if ((rel
+ 1) >= relend
)
1241 if (r_type
== R_X86_64_TLSGD
)
1243 /* Check transition from GD access model. For 64bit, only
1244 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1245 .word 0x6666; rex64; call __tls_get_addr
1246 can transit to different access model. For 32bit, only
1247 leaq foo@tlsgd(%rip), %rdi
1248 .word 0x6666; rex64; call __tls_get_addr
1249 can transit to different access model. For largepic
1251 leaq foo@tlsgd(%rip), %rdi
1252 movabsq $__tls_get_addr@pltoff, %rax
1256 static const unsigned char call
[] = { 0x66, 0x66, 0x48, 0xe8 };
1257 static const unsigned char leaq
[] = { 0x66, 0x48, 0x8d, 0x3d };
1259 if ((offset
+ 12) > sec
->size
)
1262 if (memcmp (contents
+ offset
+ 4, call
, 4) != 0)
1264 if (!ABI_64_P (abfd
)
1265 || (offset
+ 19) > sec
->size
1267 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0
1268 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1269 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1274 else if (ABI_64_P (abfd
))
1277 || memcmp (contents
+ offset
- 4, leaq
, 4) != 0)
1283 || memcmp (contents
+ offset
- 3, leaq
+ 1, 3) != 0)
1289 /* Check transition from LD access model. Only
1290 leaq foo@tlsld(%rip), %rdi;
1292 can transit to different access model. For largepic
1294 leaq foo@tlsld(%rip), %rdi
1295 movabsq $__tls_get_addr@pltoff, %rax
1299 static const unsigned char lea
[] = { 0x48, 0x8d, 0x3d };
1301 if (offset
< 3 || (offset
+ 9) > sec
->size
)
1304 if (memcmp (contents
+ offset
- 3, lea
, 3) != 0)
1307 if (0xe8 != *(contents
+ offset
+ 4))
1309 if (!ABI_64_P (abfd
)
1310 || (offset
+ 19) > sec
->size
1311 || memcmp (contents
+ offset
+ 4, "\x48\xb8", 2) != 0
1312 || memcmp (contents
+ offset
+ 14, "\x48\x01\xd8\xff\xd0", 5)
1319 r_symndx
= htab
->r_sym (rel
[1].r_info
);
1320 if (r_symndx
< symtab_hdr
->sh_info
)
1323 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1324 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1325 may be versioned. */
1327 && h
->root
.root
.string
!= NULL
1329 ? ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLTOFF64
1330 : (ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PC32
1331 || ELF32_R_TYPE (rel
[1].r_info
) == R_X86_64_PLT32
))
1332 && (strncmp (h
->root
.root
.string
,
1333 "__tls_get_addr", 14) == 0));
1335 case R_X86_64_GOTTPOFF
:
1336 /* Check transition from IE access model:
1337 mov foo@gottpoff(%rip), %reg
1338 add foo@gottpoff(%rip), %reg
1341 /* Check REX prefix first. */
1342 if (offset
>= 3 && (offset
+ 4) <= sec
->size
)
1344 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1345 if (val
!= 0x48 && val
!= 0x4c)
1347 /* X32 may have 0x44 REX prefix or no REX prefix. */
1348 if (ABI_64_P (abfd
))
1354 /* X32 may not have any REX prefix. */
1355 if (ABI_64_P (abfd
))
1357 if (offset
< 2 || (offset
+ 3) > sec
->size
)
1361 val
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1362 if (val
!= 0x8b && val
!= 0x03)
1365 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1366 return (val
& 0xc7) == 5;
1368 case R_X86_64_GOTPC32_TLSDESC
:
1369 /* Check transition from GDesc access model:
1370 leaq x@tlsdesc(%rip), %rax
1372 Make sure it's a leaq adding rip to a 32-bit offset
1373 into any register, although it's probably almost always
1376 if (offset
< 3 || (offset
+ 4) > sec
->size
)
1379 val
= bfd_get_8 (abfd
, contents
+ offset
- 3);
1380 if ((val
& 0xfb) != 0x48)
1383 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1386 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1387 return (val
& 0xc7) == 0x05;
1389 case R_X86_64_TLSDESC_CALL
:
1390 /* Check transition from GDesc access model:
1391 call *x@tlsdesc(%rax)
1393 if (offset
+ 2 <= sec
->size
)
1395 /* Make sure that it's a call *x@tlsdesc(%rax). */
1396 static const unsigned char call
[] = { 0xff, 0x10 };
1397 return memcmp (contents
+ offset
, call
, 2) == 0;
1407 /* Return TRUE if the TLS access transition is OK or no transition
1408 will be performed. Update R_TYPE if there is a transition. */
1411 elf_x86_64_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1412 asection
*sec
, bfd_byte
*contents
,
1413 Elf_Internal_Shdr
*symtab_hdr
,
1414 struct elf_link_hash_entry
**sym_hashes
,
1415 unsigned int *r_type
, int tls_type
,
1416 const Elf_Internal_Rela
*rel
,
1417 const Elf_Internal_Rela
*relend
,
1418 struct elf_link_hash_entry
*h
,
1419 unsigned long r_symndx
)
1421 unsigned int from_type
= *r_type
;
1422 unsigned int to_type
= from_type
;
1423 bfd_boolean check
= TRUE
;
1425 /* Skip TLS transition for functions. */
1427 && (h
->type
== STT_FUNC
1428 || h
->type
== STT_GNU_IFUNC
))
1433 case R_X86_64_TLSGD
:
1434 case R_X86_64_GOTPC32_TLSDESC
:
1435 case R_X86_64_TLSDESC_CALL
:
1436 case R_X86_64_GOTTPOFF
:
1437 if (info
->executable
)
1440 to_type
= R_X86_64_TPOFF32
;
1442 to_type
= R_X86_64_GOTTPOFF
;
1445 /* When we are called from elf_x86_64_relocate_section,
1446 CONTENTS isn't NULL and there may be additional transitions
1447 based on TLS_TYPE. */
1448 if (contents
!= NULL
)
1450 unsigned int new_to_type
= to_type
;
1452 if (info
->executable
1455 && tls_type
== GOT_TLS_IE
)
1456 new_to_type
= R_X86_64_TPOFF32
;
1458 if (to_type
== R_X86_64_TLSGD
1459 || to_type
== R_X86_64_GOTPC32_TLSDESC
1460 || to_type
== R_X86_64_TLSDESC_CALL
)
1462 if (tls_type
== GOT_TLS_IE
)
1463 new_to_type
= R_X86_64_GOTTPOFF
;
1466 /* We checked the transition before when we were called from
1467 elf_x86_64_check_relocs. We only want to check the new
1468 transition which hasn't been checked before. */
1469 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1470 to_type
= new_to_type
;
1475 case R_X86_64_TLSLD
:
1476 if (info
->executable
)
1477 to_type
= R_X86_64_TPOFF32
;
1484 /* Return TRUE if there is no transition. */
1485 if (from_type
== to_type
)
1488 /* Check if the transition can be performed. */
1490 && ! elf_x86_64_check_tls_transition (abfd
, info
, sec
, contents
,
1491 symtab_hdr
, sym_hashes
,
1492 from_type
, rel
, relend
))
1494 reloc_howto_type
*from
, *to
;
1497 from
= elf_x86_64_rtype_to_howto (abfd
, from_type
);
1498 to
= elf_x86_64_rtype_to_howto (abfd
, to_type
);
1501 name
= h
->root
.root
.string
;
1504 struct elf_x86_64_link_hash_table
*htab
;
1506 htab
= elf_x86_64_hash_table (info
);
1511 Elf_Internal_Sym
*isym
;
1513 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1515 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1519 (*_bfd_error_handler
)
1520 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1521 "in section `%A' failed"),
1522 abfd
, sec
, from
->name
, to
->name
, name
,
1523 (unsigned long) rel
->r_offset
);
1524 bfd_set_error (bfd_error_bad_value
);
1532 /* Rename some of the generic section flags to better document how they
1534 #define need_convert_mov_to_lea sec_flg0
1536 /* Look through the relocs for a section during the first phase, and
1537 calculate needed space in the global offset table, procedure
1538 linkage table, and dynamic reloc sections. */
1541 elf_x86_64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
1543 const Elf_Internal_Rela
*relocs
)
1545 struct elf_x86_64_link_hash_table
*htab
;
1546 Elf_Internal_Shdr
*symtab_hdr
;
1547 struct elf_link_hash_entry
**sym_hashes
;
1548 const Elf_Internal_Rela
*rel
;
1549 const Elf_Internal_Rela
*rel_end
;
1551 bfd_boolean use_plt_got
;
1553 if (info
->relocatable
)
1556 BFD_ASSERT (is_x86_64_elf (abfd
));
1558 htab
= elf_x86_64_hash_table (info
);
1562 use_plt_got
= get_elf_x86_64_backend_data (abfd
) == &elf_x86_64_arch_bed
;
1564 symtab_hdr
= &elf_symtab_hdr (abfd
);
1565 sym_hashes
= elf_sym_hashes (abfd
);
1569 rel_end
= relocs
+ sec
->reloc_count
;
1570 for (rel
= relocs
; rel
< rel_end
; rel
++)
1572 unsigned int r_type
;
1573 unsigned long r_symndx
;
1574 struct elf_link_hash_entry
*h
;
1575 Elf_Internal_Sym
*isym
;
1577 bfd_boolean size_reloc
;
1579 r_symndx
= htab
->r_sym (rel
->r_info
);
1580 r_type
= ELF32_R_TYPE (rel
->r_info
);
1582 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1584 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1589 if (r_symndx
< symtab_hdr
->sh_info
)
1591 /* A local symbol. */
1592 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1597 /* Check relocation against local STT_GNU_IFUNC symbol. */
1598 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1600 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
,
1605 /* Fake a STT_GNU_IFUNC symbol. */
1606 h
->type
= STT_GNU_IFUNC
;
1609 h
->forced_local
= 1;
1610 h
->root
.type
= bfd_link_hash_defined
;
1618 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1619 while (h
->root
.type
== bfd_link_hash_indirect
1620 || h
->root
.type
== bfd_link_hash_warning
)
1621 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1624 /* Check invalid x32 relocations. */
1625 if (!ABI_64_P (abfd
))
1631 case R_X86_64_DTPOFF64
:
1632 case R_X86_64_TPOFF64
:
1634 case R_X86_64_GOTOFF64
:
1635 case R_X86_64_GOT64
:
1636 case R_X86_64_GOTPCREL64
:
1637 case R_X86_64_GOTPC64
:
1638 case R_X86_64_GOTPLT64
:
1639 case R_X86_64_PLTOFF64
:
1642 name
= h
->root
.root
.string
;
1644 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1646 (*_bfd_error_handler
)
1647 (_("%B: relocation %s against symbol `%s' isn't "
1648 "supported in x32 mode"), abfd
,
1649 x86_64_elf_howto_table
[r_type
].name
, name
);
1650 bfd_set_error (bfd_error_bad_value
);
1658 /* Create the ifunc sections for static executables. If we
1659 never see an indirect function symbol nor we are building
1660 a static executable, those sections will be empty and
1661 won't appear in output. */
1667 case R_X86_64_PC32_BND
:
1668 case R_X86_64_PLT32_BND
:
1670 case R_X86_64_PLT32
:
1673 /* MPX PLT is supported only if elf_x86_64_arch_bed
1674 is used in 64-bit mode. */
1677 && (get_elf_x86_64_backend_data (abfd
)
1678 == &elf_x86_64_arch_bed
))
1680 elf_x86_64_hash_entry (h
)->has_bnd_reloc
= 1;
1682 /* Create the second PLT for Intel MPX support. */
1683 if (htab
->plt_bnd
== NULL
)
1685 unsigned int plt_bnd_align
;
1686 const struct elf_backend_data
*bed
;
1688 bed
= get_elf_backend_data (info
->output_bfd
);
1689 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry
) == 8
1690 && (sizeof (elf_x86_64_bnd_plt2_entry
)
1691 == sizeof (elf_x86_64_legacy_plt2_entry
)));
1694 if (htab
->elf
.dynobj
== NULL
)
1695 htab
->elf
.dynobj
= abfd
;
1697 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1699 (bed
->dynamic_sec_flags
1704 if (htab
->plt_bnd
== NULL
1705 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1714 case R_X86_64_GOTPCREL
:
1715 case R_X86_64_GOTPCREL64
:
1716 if (htab
->elf
.dynobj
== NULL
)
1717 htab
->elf
.dynobj
= abfd
;
1718 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1723 /* It is referenced by a non-shared object. */
1725 h
->root
.non_ir_ref
= 1;
1728 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
1729 symtab_hdr
, sym_hashes
,
1730 &r_type
, GOT_UNKNOWN
,
1731 rel
, rel_end
, h
, r_symndx
))
1736 case R_X86_64_TLSLD
:
1737 htab
->tls_ld_got
.refcount
+= 1;
1740 case R_X86_64_TPOFF32
:
1741 if (!info
->executable
&& ABI_64_P (abfd
))
1744 name
= h
->root
.root
.string
;
1746 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1748 (*_bfd_error_handler
)
1749 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1751 x86_64_elf_howto_table
[r_type
].name
, name
);
1752 bfd_set_error (bfd_error_bad_value
);
1757 case R_X86_64_GOTTPOFF
:
1758 if (!info
->executable
)
1759 info
->flags
|= DF_STATIC_TLS
;
1762 case R_X86_64_GOT32
:
1763 case R_X86_64_GOTPCREL
:
1764 case R_X86_64_TLSGD
:
1765 case R_X86_64_GOT64
:
1766 case R_X86_64_GOTPCREL64
:
1767 case R_X86_64_GOTPLT64
:
1768 case R_X86_64_GOTPC32_TLSDESC
:
1769 case R_X86_64_TLSDESC_CALL
:
1770 /* This symbol requires a global offset table entry. */
1772 int tls_type
, old_tls_type
;
1776 default: tls_type
= GOT_NORMAL
; break;
1777 case R_X86_64_TLSGD
: tls_type
= GOT_TLS_GD
; break;
1778 case R_X86_64_GOTTPOFF
: tls_type
= GOT_TLS_IE
; break;
1779 case R_X86_64_GOTPC32_TLSDESC
:
1780 case R_X86_64_TLSDESC_CALL
:
1781 tls_type
= GOT_TLS_GDESC
; break;
1786 h
->got
.refcount
+= 1;
1787 old_tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
1791 bfd_signed_vma
*local_got_refcounts
;
1793 /* This is a global offset table entry for a local symbol. */
1794 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1795 if (local_got_refcounts
== NULL
)
1799 size
= symtab_hdr
->sh_info
;
1800 size
*= sizeof (bfd_signed_vma
)
1801 + sizeof (bfd_vma
) + sizeof (char);
1802 local_got_refcounts
= ((bfd_signed_vma
*)
1803 bfd_zalloc (abfd
, size
));
1804 if (local_got_refcounts
== NULL
)
1806 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1807 elf_x86_64_local_tlsdesc_gotent (abfd
)
1808 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1809 elf_x86_64_local_got_tls_type (abfd
)
1810 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1812 local_got_refcounts
[r_symndx
] += 1;
1814 = elf_x86_64_local_got_tls_type (abfd
) [r_symndx
];
1817 /* If a TLS symbol is accessed using IE at least once,
1818 there is no point to use dynamic model for it. */
1819 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1820 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1821 || tls_type
!= GOT_TLS_IE
))
1823 if (old_tls_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (tls_type
))
1824 tls_type
= old_tls_type
;
1825 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1826 && GOT_TLS_GD_ANY_P (tls_type
))
1827 tls_type
|= old_tls_type
;
1831 name
= h
->root
.root
.string
;
1833 name
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1835 (*_bfd_error_handler
)
1836 (_("%B: '%s' accessed both as normal and thread local symbol"),
1838 bfd_set_error (bfd_error_bad_value
);
1843 if (old_tls_type
!= tls_type
)
1846 elf_x86_64_hash_entry (h
)->tls_type
= tls_type
;
1848 elf_x86_64_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1853 case R_X86_64_GOTOFF64
:
1854 case R_X86_64_GOTPC32
:
1855 case R_X86_64_GOTPC64
:
1857 if (htab
->elf
.sgot
== NULL
)
1859 if (htab
->elf
.dynobj
== NULL
)
1860 htab
->elf
.dynobj
= abfd
;
1861 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1867 case R_X86_64_PLT32
:
1868 case R_X86_64_PLT32_BND
:
1869 /* This symbol requires a procedure linkage table entry. We
1870 actually build the entry in adjust_dynamic_symbol,
1871 because this might be a case of linking PIC code which is
1872 never referenced by a dynamic object, in which case we
1873 don't need to generate a procedure linkage table entry
1876 /* If this is a local symbol, we resolve it directly without
1877 creating a procedure linkage table entry. */
1882 h
->plt
.refcount
+= 1;
1885 case R_X86_64_PLTOFF64
:
1886 /* This tries to form the 'address' of a function relative
1887 to GOT. For global symbols we need a PLT entry. */
1891 h
->plt
.refcount
+= 1;
1895 case R_X86_64_SIZE32
:
1896 case R_X86_64_SIZE64
:
1901 if (!ABI_64_P (abfd
))
1906 /* Let's help debug shared library creation. These relocs
1907 cannot be used in shared libs. Don't error out for
1908 sections we don't care about, such as debug sections or
1909 non-constant sections. */
1911 && (sec
->flags
& SEC_ALLOC
) != 0
1912 && (sec
->flags
& SEC_READONLY
) != 0)
1915 name
= h
->root
.root
.string
;
1917 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1918 (*_bfd_error_handler
)
1919 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1920 abfd
, x86_64_elf_howto_table
[r_type
].name
, name
);
1921 bfd_set_error (bfd_error_bad_value
);
1929 case R_X86_64_PC32_BND
:
1933 if (h
!= NULL
&& info
->executable
)
1935 /* If this reloc is in a read-only section, we might
1936 need a copy reloc. We can't check reliably at this
1937 stage whether the section is read-only, as input
1938 sections have not yet been mapped to output sections.
1939 Tentatively set the flag for now, and correct in
1940 adjust_dynamic_symbol. */
1943 /* We may need a .plt entry if the function this reloc
1944 refers to is in a shared lib. */
1945 h
->plt
.refcount
+= 1;
1946 if (r_type
!= R_X86_64_PC32
1947 && r_type
!= R_X86_64_PC32_BND
1948 && r_type
!= R_X86_64_PC64
)
1949 h
->pointer_equality_needed
= 1;
1954 /* If we are creating a shared library, and this is a reloc
1955 against a global symbol, or a non PC relative reloc
1956 against a local symbol, then we need to copy the reloc
1957 into the shared library. However, if we are linking with
1958 -Bsymbolic, we do not need to copy a reloc against a
1959 global symbol which is defined in an object we are
1960 including in the link (i.e., DEF_REGULAR is set). At
1961 this point we have not seen all the input files, so it is
1962 possible that DEF_REGULAR is not set now but will be set
1963 later (it is never cleared). In case of a weak definition,
1964 DEF_REGULAR may be cleared later by a strong definition in
1965 a shared library. We account for that possibility below by
1966 storing information in the relocs_copied field of the hash
1967 table entry. A similar situation occurs when creating
1968 shared libraries and symbol visibility changes render the
1971 If on the other hand, we are creating an executable, we
1972 may need to keep relocations for symbols satisfied by a
1973 dynamic library if we manage to avoid copy relocs for the
1976 && (sec
->flags
& SEC_ALLOC
) != 0
1977 && (! IS_X86_64_PCREL_TYPE (r_type
)
1979 && (! SYMBOLIC_BIND (info
, h
)
1980 || h
->root
.type
== bfd_link_hash_defweak
1981 || !h
->def_regular
))))
1982 || (ELIMINATE_COPY_RELOCS
1984 && (sec
->flags
& SEC_ALLOC
) != 0
1986 && (h
->root
.type
== bfd_link_hash_defweak
1987 || !h
->def_regular
)))
1989 struct elf_dyn_relocs
*p
;
1990 struct elf_dyn_relocs
**head
;
1992 /* We must copy these reloc types into the output file.
1993 Create a reloc section in dynobj and make room for
1997 if (htab
->elf
.dynobj
== NULL
)
1998 htab
->elf
.dynobj
= abfd
;
2000 sreloc
= _bfd_elf_make_dynamic_reloc_section
2001 (sec
, htab
->elf
.dynobj
, ABI_64_P (abfd
) ? 3 : 2,
2002 abfd
, /*rela?*/ TRUE
);
2008 /* If this is a global symbol, we count the number of
2009 relocations we need for this symbol. */
2012 head
= &((struct elf_x86_64_link_hash_entry
*) h
)->dyn_relocs
;
2016 /* Track dynamic relocs needed for local syms too.
2017 We really need local syms available to do this
2022 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2027 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2031 /* Beware of type punned pointers vs strict aliasing
2033 vpp
= &(elf_section_data (s
)->local_dynrel
);
2034 head
= (struct elf_dyn_relocs
**)vpp
;
2038 if (p
== NULL
|| p
->sec
!= sec
)
2040 bfd_size_type amt
= sizeof *p
;
2042 p
= ((struct elf_dyn_relocs
*)
2043 bfd_alloc (htab
->elf
.dynobj
, amt
));
2054 /* Count size relocation as PC-relative relocation. */
2055 if (IS_X86_64_PCREL_TYPE (r_type
) || size_reloc
)
2060 /* This relocation describes the C++ object vtable hierarchy.
2061 Reconstruct it for later use during GC. */
2062 case R_X86_64_GNU_VTINHERIT
:
2063 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2067 /* This relocation describes which C++ vtable entries are actually
2068 used. Record for later use during GC. */
2069 case R_X86_64_GNU_VTENTRY
:
2070 BFD_ASSERT (h
!= NULL
);
2072 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
2082 && h
->plt
.refcount
> 0
2083 && h
->got
.refcount
> 0
2084 && htab
->plt_got
== NULL
)
2086 /* Create the GOT procedure linkage table. */
2087 unsigned int plt_got_align
;
2088 const struct elf_backend_data
*bed
;
2090 bed
= get_elf_backend_data (info
->output_bfd
);
2091 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry
) == 8
2092 && (sizeof (elf_x86_64_bnd_plt2_entry
)
2093 == sizeof (elf_x86_64_legacy_plt2_entry
)));
2096 if (htab
->elf
.dynobj
== NULL
)
2097 htab
->elf
.dynobj
= abfd
;
2099 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2101 (bed
->dynamic_sec_flags
2106 if (htab
->plt_got
== NULL
2107 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2113 if (r_type
== R_X86_64_GOTPCREL
2114 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2115 sec
->need_convert_mov_to_lea
= 1;
2121 /* Return the section that should be marked against GC for a given
2125 elf_x86_64_gc_mark_hook (asection
*sec
,
2126 struct bfd_link_info
*info
,
2127 Elf_Internal_Rela
*rel
,
2128 struct elf_link_hash_entry
*h
,
2129 Elf_Internal_Sym
*sym
)
2132 switch (ELF32_R_TYPE (rel
->r_info
))
2134 case R_X86_64_GNU_VTINHERIT
:
2135 case R_X86_64_GNU_VTENTRY
:
2139 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2142 /* Update the got entry reference counts for the section being removed. */
2145 elf_x86_64_gc_sweep_hook (bfd
*abfd
, struct bfd_link_info
*info
,
2147 const Elf_Internal_Rela
*relocs
)
2149 struct elf_x86_64_link_hash_table
*htab
;
2150 Elf_Internal_Shdr
*symtab_hdr
;
2151 struct elf_link_hash_entry
**sym_hashes
;
2152 bfd_signed_vma
*local_got_refcounts
;
2153 const Elf_Internal_Rela
*rel
, *relend
;
2155 if (info
->relocatable
)
2158 htab
= elf_x86_64_hash_table (info
);
2162 elf_section_data (sec
)->local_dynrel
= NULL
;
2164 symtab_hdr
= &elf_symtab_hdr (abfd
);
2165 sym_hashes
= elf_sym_hashes (abfd
);
2166 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2168 htab
= elf_x86_64_hash_table (info
);
2169 relend
= relocs
+ sec
->reloc_count
;
2170 for (rel
= relocs
; rel
< relend
; rel
++)
2172 unsigned long r_symndx
;
2173 unsigned int r_type
;
2174 struct elf_link_hash_entry
*h
= NULL
;
2176 r_symndx
= htab
->r_sym (rel
->r_info
);
2177 if (r_symndx
>= symtab_hdr
->sh_info
)
2179 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2180 while (h
->root
.type
== bfd_link_hash_indirect
2181 || h
->root
.type
== bfd_link_hash_warning
)
2182 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2186 /* A local symbol. */
2187 Elf_Internal_Sym
*isym
;
2189 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2192 /* Check relocation against local STT_GNU_IFUNC symbol. */
2194 && ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2196 h
= elf_x86_64_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2204 struct elf_x86_64_link_hash_entry
*eh
;
2205 struct elf_dyn_relocs
**pp
;
2206 struct elf_dyn_relocs
*p
;
2208 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2210 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2213 /* Everything must go for SEC. */
2219 r_type
= ELF32_R_TYPE (rel
->r_info
);
2220 if (! elf_x86_64_tls_transition (info
, abfd
, sec
, NULL
,
2221 symtab_hdr
, sym_hashes
,
2222 &r_type
, GOT_UNKNOWN
,
2223 rel
, relend
, h
, r_symndx
))
2228 case R_X86_64_TLSLD
:
2229 if (htab
->tls_ld_got
.refcount
> 0)
2230 htab
->tls_ld_got
.refcount
-= 1;
2233 case R_X86_64_TLSGD
:
2234 case R_X86_64_GOTPC32_TLSDESC
:
2235 case R_X86_64_TLSDESC_CALL
:
2236 case R_X86_64_GOTTPOFF
:
2237 case R_X86_64_GOT32
:
2238 case R_X86_64_GOTPCREL
:
2239 case R_X86_64_GOT64
:
2240 case R_X86_64_GOTPCREL64
:
2241 case R_X86_64_GOTPLT64
:
2244 if (h
->got
.refcount
> 0)
2245 h
->got
.refcount
-= 1;
2246 if (h
->type
== STT_GNU_IFUNC
)
2248 if (h
->plt
.refcount
> 0)
2249 h
->plt
.refcount
-= 1;
2252 else if (local_got_refcounts
!= NULL
)
2254 if (local_got_refcounts
[r_symndx
] > 0)
2255 local_got_refcounts
[r_symndx
] -= 1;
2267 case R_X86_64_PC32_BND
:
2269 case R_X86_64_SIZE32
:
2270 case R_X86_64_SIZE64
:
2272 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2276 case R_X86_64_PLT32
:
2277 case R_X86_64_PLT32_BND
:
2278 case R_X86_64_PLTOFF64
:
2281 if (h
->plt
.refcount
> 0)
2282 h
->plt
.refcount
-= 1;
2294 /* Adjust a symbol defined by a dynamic object and referenced by a
2295 regular object. The current definition is in some section of the
2296 dynamic object, but we're not including those sections. We have to
2297 change the definition to something the rest of the link can
2301 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2302 struct elf_link_hash_entry
*h
)
2304 struct elf_x86_64_link_hash_table
*htab
;
2306 struct elf_x86_64_link_hash_entry
*eh
;
2307 struct elf_dyn_relocs
*p
;
2309 /* STT_GNU_IFUNC symbol must go through PLT. */
2310 if (h
->type
== STT_GNU_IFUNC
)
2312 /* All local STT_GNU_IFUNC references must be treate as local
2313 calls via local PLT. */
2315 && SYMBOL_CALLS_LOCAL (info
, h
))
2317 bfd_size_type pc_count
= 0, count
= 0;
2318 struct elf_dyn_relocs
**pp
;
2320 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2321 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2323 pc_count
+= p
->pc_count
;
2324 p
->count
-= p
->pc_count
;
2333 if (pc_count
|| count
)
2337 if (h
->plt
.refcount
<= 0)
2338 h
->plt
.refcount
= 1;
2340 h
->plt
.refcount
+= 1;
2344 if (h
->plt
.refcount
<= 0)
2346 h
->plt
.offset
= (bfd_vma
) -1;
2352 /* If this is a function, put it in the procedure linkage table. We
2353 will fill in the contents of the procedure linkage table later,
2354 when we know the address of the .got section. */
2355 if (h
->type
== STT_FUNC
2358 if (h
->plt
.refcount
<= 0
2359 || SYMBOL_CALLS_LOCAL (info
, h
)
2360 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2361 && h
->root
.type
== bfd_link_hash_undefweak
))
2363 /* This case can occur if we saw a PLT32 reloc in an input
2364 file, but the symbol was never referred to by a dynamic
2365 object, or if all references were garbage collected. In
2366 such a case, we don't actually need to build a procedure
2367 linkage table, and we can just do a PC32 reloc instead. */
2368 h
->plt
.offset
= (bfd_vma
) -1;
2375 /* It's possible that we incorrectly decided a .plt reloc was
2376 needed for an R_X86_64_PC32 reloc to a non-function sym in
2377 check_relocs. We can't decide accurately between function and
2378 non-function syms in check-relocs; Objects loaded later in
2379 the link may change h->type. So fix it now. */
2380 h
->plt
.offset
= (bfd_vma
) -1;
2382 /* If this is a weak symbol, and there is a real definition, the
2383 processor independent code will have arranged for us to see the
2384 real definition first, and we can just use the same value. */
2385 if (h
->u
.weakdef
!= NULL
)
2387 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2388 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2389 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2390 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2391 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2393 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2394 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2395 eh
->needs_copy
= h
->u
.weakdef
->needs_copy
;
2400 /* This is a reference to a symbol defined by a dynamic object which
2401 is not a function. */
2403 /* If we are creating a shared library, we must presume that the
2404 only references to the symbol are via the global offset table.
2405 For such cases we need not do anything here; the relocations will
2406 be handled correctly by relocate_section. */
2407 if (!info
->executable
)
2410 /* If there are no references to this symbol that do not use the
2411 GOT, we don't need to generate a copy reloc. */
2412 if (!h
->non_got_ref
)
2415 /* If -z nocopyreloc was given, we won't generate them either. */
2416 if (info
->nocopyreloc
)
2422 if (ELIMINATE_COPY_RELOCS
)
2424 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2425 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2427 s
= p
->sec
->output_section
;
2428 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2432 /* If we didn't find any dynamic relocs in read-only sections, then
2433 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2441 /* We must allocate the symbol in our .dynbss section, which will
2442 become part of the .bss section of the executable. There will be
2443 an entry for this symbol in the .dynsym section. The dynamic
2444 object will contain position independent code, so all references
2445 from the dynamic object to this symbol will go through the global
2446 offset table. The dynamic linker will use the .dynsym entry to
2447 determine the address it must put in the global offset table, so
2448 both the dynamic object and the regular object will refer to the
2449 same memory location for the variable. */
2451 htab
= elf_x86_64_hash_table (info
);
2455 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2456 to copy the initial value out of the dynamic object and into the
2457 runtime process image. */
2458 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2460 const struct elf_backend_data
*bed
;
2461 bed
= get_elf_backend_data (info
->output_bfd
);
2462 htab
->srelbss
->size
+= bed
->s
->sizeof_rela
;
2468 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2471 /* Allocate space in .plt, .got and associated reloc sections for
2475 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
2477 struct bfd_link_info
*info
;
2478 struct elf_x86_64_link_hash_table
*htab
;
2479 struct elf_x86_64_link_hash_entry
*eh
;
2480 struct elf_dyn_relocs
*p
;
2481 const struct elf_backend_data
*bed
;
2482 unsigned int plt_entry_size
;
2484 if (h
->root
.type
== bfd_link_hash_indirect
)
2487 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2489 info
= (struct bfd_link_info
*) inf
;
2490 htab
= elf_x86_64_hash_table (info
);
2493 bed
= get_elf_backend_data (info
->output_bfd
);
2494 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2496 /* We can't use the GOT PLT if pointer equality is needed since
2497 finish_dynamic_symbol won't clear symbol value and the dynamic
2498 linker won't update the GOT slot. We will get into an infinite
2499 loop at run-time. */
2500 if (htab
->plt_got
!= NULL
2501 && h
->type
!= STT_GNU_IFUNC
2502 && !h
->pointer_equality_needed
2503 && h
->plt
.refcount
> 0
2504 && h
->got
.refcount
> 0)
2506 /* Don't use the regular PLT if there are both GOT and GOTPLT
2508 h
->plt
.offset
= (bfd_vma
) -1;
2510 /* Use the GOT PLT. */
2511 eh
->plt_got
.refcount
= 1;
2514 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2515 here if it is defined and referenced in a non-shared object. */
2516 if (h
->type
== STT_GNU_IFUNC
2519 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2525 asection
*s
= htab
->plt_bnd
;
2526 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2528 /* Use the .plt.bnd section if it is created. */
2529 eh
->plt_bnd
.offset
= s
->size
;
2531 /* Make room for this entry in the .plt.bnd section. */
2532 s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2540 else if (htab
->elf
.dynamic_sections_created
2541 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2543 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2545 /* Make sure this symbol is output as a dynamic symbol.
2546 Undefined weak syms won't yet be marked as dynamic. */
2547 if (h
->dynindx
== -1
2548 && !h
->forced_local
)
2550 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2555 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2557 asection
*s
= htab
->elf
.splt
;
2558 asection
*bnd_s
= htab
->plt_bnd
;
2559 asection
*got_s
= htab
->plt_got
;
2561 /* If this is the first .plt entry, make room for the special
2564 s
->size
= plt_entry_size
;
2567 eh
->plt_got
.offset
= got_s
->size
;
2570 h
->plt
.offset
= s
->size
;
2572 eh
->plt_bnd
.offset
= bnd_s
->size
;
2575 /* If this symbol is not defined in a regular file, and we are
2576 not generating a shared library, then set the symbol to this
2577 location in the .plt. This is required to make function
2578 pointers compare as equal between the normal executable and
2579 the shared library. */
2585 /* We need to make a call to the entry of the GOT PLT
2586 instead of regular PLT entry. */
2587 h
->root
.u
.def
.section
= got_s
;
2588 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2594 /* We need to make a call to the entry of the second
2595 PLT instead of regular PLT entry. */
2596 h
->root
.u
.def
.section
= bnd_s
;
2597 h
->root
.u
.def
.value
= eh
->plt_bnd
.offset
;
2601 h
->root
.u
.def
.section
= s
;
2602 h
->root
.u
.def
.value
= h
->plt
.offset
;
2607 /* Make room for this entry. */
2609 got_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2612 s
->size
+= plt_entry_size
;
2614 bnd_s
->size
+= sizeof (elf_x86_64_legacy_plt2_entry
);
2616 /* We also need to make an entry in the .got.plt section,
2617 which will be placed in the .got section by the linker
2619 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
2621 /* We also need to make an entry in the .rela.plt
2623 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2624 htab
->elf
.srelplt
->reloc_count
++;
2629 h
->plt
.offset
= (bfd_vma
) -1;
2635 h
->plt
.offset
= (bfd_vma
) -1;
2639 eh
->tlsdesc_got
= (bfd_vma
) -1;
2641 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2642 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2643 if (h
->got
.refcount
> 0
2646 && elf_x86_64_hash_entry (h
)->tls_type
== GOT_TLS_IE
)
2648 h
->got
.offset
= (bfd_vma
) -1;
2650 else if (h
->got
.refcount
> 0)
2654 int tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
2656 /* Make sure this symbol is output as a dynamic symbol.
2657 Undefined weak syms won't yet be marked as dynamic. */
2658 if (h
->dynindx
== -1
2659 && !h
->forced_local
)
2661 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2665 if (GOT_TLS_GDESC_P (tls_type
))
2667 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2668 - elf_x86_64_compute_jump_table_size (htab
);
2669 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
2670 h
->got
.offset
= (bfd_vma
) -2;
2672 if (! GOT_TLS_GDESC_P (tls_type
)
2673 || GOT_TLS_GD_P (tls_type
))
2676 h
->got
.offset
= s
->size
;
2677 s
->size
+= GOT_ENTRY_SIZE
;
2678 if (GOT_TLS_GD_P (tls_type
))
2679 s
->size
+= GOT_ENTRY_SIZE
;
2681 dyn
= htab
->elf
.dynamic_sections_created
;
2682 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2684 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2685 if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2686 || tls_type
== GOT_TLS_IE
)
2687 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2688 else if (GOT_TLS_GD_P (tls_type
))
2689 htab
->elf
.srelgot
->size
+= 2 * bed
->s
->sizeof_rela
;
2690 else if (! GOT_TLS_GDESC_P (tls_type
)
2691 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2692 || h
->root
.type
!= bfd_link_hash_undefweak
)
2694 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2695 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
2696 if (GOT_TLS_GDESC_P (tls_type
))
2698 htab
->elf
.srelplt
->size
+= bed
->s
->sizeof_rela
;
2699 htab
->tlsdesc_plt
= (bfd_vma
) -1;
2703 h
->got
.offset
= (bfd_vma
) -1;
2705 if (eh
->dyn_relocs
== NULL
)
2708 /* In the shared -Bsymbolic case, discard space allocated for
2709 dynamic pc-relative relocs against symbols which turn out to be
2710 defined in regular objects. For the normal shared case, discard
2711 space for pc-relative relocs that have become local due to symbol
2712 visibility changes. */
2716 /* Relocs that use pc_count are those that appear on a call
2717 insn, or certain REL relocs that can generated via assembly.
2718 We want calls to protected symbols to resolve directly to the
2719 function rather than going via the plt. If people want
2720 function pointer comparisons to work as expected then they
2721 should avoid writing weird assembly. */
2722 if (SYMBOL_CALLS_LOCAL (info
, h
))
2724 struct elf_dyn_relocs
**pp
;
2726 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2728 p
->count
-= p
->pc_count
;
2737 /* Also discard relocs on undefined weak syms with non-default
2739 if (eh
->dyn_relocs
!= NULL
)
2741 if (h
->root
.type
== bfd_link_hash_undefweak
)
2743 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2744 eh
->dyn_relocs
= NULL
;
2746 /* Make sure undefined weak symbols are output as a dynamic
2748 else if (h
->dynindx
== -1
2749 && ! h
->forced_local
2750 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2753 /* For PIE, discard space for pc-relative relocs against
2754 symbols which turn out to need copy relocs. */
2755 else if (info
->executable
2756 && (h
->needs_copy
|| eh
->needs_copy
)
2760 struct elf_dyn_relocs
**pp
;
2762 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2764 if (p
->pc_count
!= 0)
2772 else if (ELIMINATE_COPY_RELOCS
)
2774 /* For the non-shared case, discard space for relocs against
2775 symbols which turn out to need copy relocs or are not
2781 || (htab
->elf
.dynamic_sections_created
2782 && (h
->root
.type
== bfd_link_hash_undefweak
2783 || h
->root
.type
== bfd_link_hash_undefined
))))
2785 /* Make sure this symbol is output as a dynamic symbol.
2786 Undefined weak syms won't yet be marked as dynamic. */
2787 if (h
->dynindx
== -1
2788 && ! h
->forced_local
2789 && ! bfd_elf_link_record_dynamic_symbol (info
, h
))
2792 /* If that succeeded, we know we'll be keeping all the
2794 if (h
->dynindx
!= -1)
2798 eh
->dyn_relocs
= NULL
;
2803 /* Finally, allocate space. */
2804 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2808 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2810 BFD_ASSERT (sreloc
!= NULL
);
2812 sreloc
->size
+= p
->count
* bed
->s
->sizeof_rela
;
2818 /* Allocate space in .plt, .got and associated reloc sections for
2819 local dynamic relocs. */
2822 elf_x86_64_allocate_local_dynrelocs (void **slot
, void *inf
)
2824 struct elf_link_hash_entry
*h
2825 = (struct elf_link_hash_entry
*) *slot
;
2827 if (h
->type
!= STT_GNU_IFUNC
2831 || h
->root
.type
!= bfd_link_hash_defined
)
2834 return elf_x86_64_allocate_dynrelocs (h
, inf
);
2837 /* Find any dynamic relocs that apply to read-only sections. */
2840 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry
*h
,
2843 struct elf_x86_64_link_hash_entry
*eh
;
2844 struct elf_dyn_relocs
*p
;
2846 /* Skip local IFUNC symbols. */
2847 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2850 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
2851 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2853 asection
*s
= p
->sec
->output_section
;
2855 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2857 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2859 info
->flags
|= DF_TEXTREL
;
2861 if ((info
->warn_shared_textrel
&& info
->shared
)
2862 || info
->error_textrel
)
2863 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2864 p
->sec
->owner
, h
->root
.root
.string
,
2867 /* Not an error, just cut short the traversal. */
2875 mov foo@GOTPCREL(%rip), %reg
2878 with the local symbol, foo. */
2881 elf_x86_64_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2882 struct bfd_link_info
*link_info
)
2884 Elf_Internal_Shdr
*symtab_hdr
;
2885 Elf_Internal_Rela
*internal_relocs
;
2886 Elf_Internal_Rela
*irel
, *irelend
;
2888 struct elf_x86_64_link_hash_table
*htab
;
2889 bfd_boolean changed_contents
;
2890 bfd_boolean changed_relocs
;
2891 bfd_signed_vma
*local_got_refcounts
;
2893 /* Don't even try to convert non-ELF outputs. */
2894 if (!is_elf_hash_table (link_info
->hash
))
2897 /* Nothing to do if there is no need or no output. */
2898 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2899 || sec
->need_convert_mov_to_lea
== 0
2900 || bfd_is_abs_section (sec
->output_section
))
2903 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2905 /* Load the relocations for this section. */
2906 internal_relocs
= (_bfd_elf_link_read_relocs
2907 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2908 link_info
->keep_memory
));
2909 if (internal_relocs
== NULL
)
2912 htab
= elf_x86_64_hash_table (link_info
);
2913 changed_contents
= FALSE
;
2914 changed_relocs
= FALSE
;
2915 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2917 /* Get the section contents. */
2918 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2919 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2922 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2926 irelend
= internal_relocs
+ sec
->reloc_count
;
2927 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2929 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2930 unsigned int r_symndx
= htab
->r_sym (irel
->r_info
);
2932 struct elf_link_hash_entry
*h
;
2934 if (r_type
!= R_X86_64_GOTPCREL
)
2937 /* Get the symbol referred to by the reloc. */
2938 if (r_symndx
< symtab_hdr
->sh_info
)
2940 Elf_Internal_Sym
*isym
;
2942 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2945 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2946 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2947 && irel
->r_offset
>= 2
2948 && bfd_get_8 (input_bfd
,
2949 contents
+ irel
->r_offset
- 2) == 0x8b)
2951 bfd_put_8 (output_bfd
, 0x8d,
2952 contents
+ irel
->r_offset
- 2);
2953 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2954 if (local_got_refcounts
!= NULL
2955 && local_got_refcounts
[r_symndx
] > 0)
2956 local_got_refcounts
[r_symndx
] -= 1;
2957 changed_contents
= TRUE
;
2958 changed_relocs
= TRUE
;
2963 indx
= r_symndx
- symtab_hdr
->sh_info
;
2964 h
= elf_sym_hashes (abfd
)[indx
];
2965 BFD_ASSERT (h
!= NULL
);
2967 while (h
->root
.type
== bfd_link_hash_indirect
2968 || h
->root
.type
== bfd_link_hash_warning
)
2969 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2971 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2972 avoid optimizing _DYNAMIC since ld.so may use its link-time
2975 && h
->type
!= STT_GNU_IFUNC
2976 && h
!= htab
->elf
.hdynamic
2977 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2978 && irel
->r_offset
>= 2
2979 && bfd_get_8 (input_bfd
,
2980 contents
+ irel
->r_offset
- 2) == 0x8b)
2982 bfd_put_8 (output_bfd
, 0x8d,
2983 contents
+ irel
->r_offset
- 2);
2984 irel
->r_info
= htab
->r_info (r_symndx
, R_X86_64_PC32
);
2985 if (h
->got
.refcount
> 0)
2986 h
->got
.refcount
-= 1;
2987 changed_contents
= TRUE
;
2988 changed_relocs
= TRUE
;
2992 if (contents
!= NULL
2993 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2995 if (!changed_contents
&& !link_info
->keep_memory
)
2999 /* Cache the section contents for elf_link_input_bfd. */
3000 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3004 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3006 if (!changed_relocs
)
3007 free (internal_relocs
);
3009 elf_section_data (sec
)->relocs
= internal_relocs
;
3015 if (contents
!= NULL
3016 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3018 if (internal_relocs
!= NULL
3019 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3020 free (internal_relocs
);
3024 /* Set the sizes of the dynamic sections. */
3027 elf_x86_64_size_dynamic_sections (bfd
*output_bfd
,
3028 struct bfd_link_info
*info
)
3030 struct elf_x86_64_link_hash_table
*htab
;
3035 const struct elf_backend_data
*bed
;
3037 htab
= elf_x86_64_hash_table (info
);
3040 bed
= get_elf_backend_data (output_bfd
);
3042 dynobj
= htab
->elf
.dynobj
;
3046 if (htab
->elf
.dynamic_sections_created
)
3048 /* Set the contents of the .interp section to the interpreter. */
3049 if (info
->executable
)
3051 s
= bfd_get_linker_section (dynobj
, ".interp");
3054 s
->size
= htab
->dynamic_interpreter_size
;
3055 s
->contents
= (unsigned char *) htab
->dynamic_interpreter
;
3059 /* Set up .got offsets for local syms, and space for local dynamic
3061 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3063 bfd_signed_vma
*local_got
;
3064 bfd_signed_vma
*end_local_got
;
3065 char *local_tls_type
;
3066 bfd_vma
*local_tlsdesc_gotent
;
3067 bfd_size_type locsymcount
;
3068 Elf_Internal_Shdr
*symtab_hdr
;
3071 if (! is_x86_64_elf (ibfd
))
3074 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3076 struct elf_dyn_relocs
*p
;
3078 if (!elf_x86_64_convert_mov_to_lea (ibfd
, s
, info
))
3081 for (p
= (struct elf_dyn_relocs
*)
3082 (elf_section_data (s
)->local_dynrel
);
3086 if (!bfd_is_abs_section (p
->sec
)
3087 && bfd_is_abs_section (p
->sec
->output_section
))
3089 /* Input section has been discarded, either because
3090 it is a copy of a linkonce section or due to
3091 linker script /DISCARD/, so we'll be discarding
3094 else if (p
->count
!= 0)
3096 srel
= elf_section_data (p
->sec
)->sreloc
;
3097 srel
->size
+= p
->count
* bed
->s
->sizeof_rela
;
3098 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3099 && (info
->flags
& DF_TEXTREL
) == 0)
3101 info
->flags
|= DF_TEXTREL
;
3102 if ((info
->warn_shared_textrel
&& info
->shared
)
3103 || info
->error_textrel
)
3104 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3105 p
->sec
->owner
, p
->sec
);
3111 local_got
= elf_local_got_refcounts (ibfd
);
3115 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3116 locsymcount
= symtab_hdr
->sh_info
;
3117 end_local_got
= local_got
+ locsymcount
;
3118 local_tls_type
= elf_x86_64_local_got_tls_type (ibfd
);
3119 local_tlsdesc_gotent
= elf_x86_64_local_tlsdesc_gotent (ibfd
);
3121 srel
= htab
->elf
.srelgot
;
3122 for (; local_got
< end_local_got
;
3123 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3125 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3128 if (GOT_TLS_GDESC_P (*local_tls_type
))
3130 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3131 - elf_x86_64_compute_jump_table_size (htab
);
3132 htab
->elf
.sgotplt
->size
+= 2 * GOT_ENTRY_SIZE
;
3133 *local_got
= (bfd_vma
) -2;
3135 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3136 || GOT_TLS_GD_P (*local_tls_type
))
3138 *local_got
= s
->size
;
3139 s
->size
+= GOT_ENTRY_SIZE
;
3140 if (GOT_TLS_GD_P (*local_tls_type
))
3141 s
->size
+= GOT_ENTRY_SIZE
;
3144 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3145 || *local_tls_type
== GOT_TLS_IE
)
3147 if (GOT_TLS_GDESC_P (*local_tls_type
))
3149 htab
->elf
.srelplt
->size
3150 += bed
->s
->sizeof_rela
;
3151 htab
->tlsdesc_plt
= (bfd_vma
) -1;
3153 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3154 || GOT_TLS_GD_P (*local_tls_type
))
3155 srel
->size
+= bed
->s
->sizeof_rela
;
3159 *local_got
= (bfd_vma
) -1;
3163 if (htab
->tls_ld_got
.refcount
> 0)
3165 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3167 htab
->tls_ld_got
.offset
= htab
->elf
.sgot
->size
;
3168 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
3169 htab
->elf
.srelgot
->size
+= bed
->s
->sizeof_rela
;
3172 htab
->tls_ld_got
.offset
= -1;
3174 /* Allocate global sym .plt and .got entries, and space for global
3175 sym dynamic relocs. */
3176 elf_link_hash_traverse (&htab
->elf
, elf_x86_64_allocate_dynrelocs
,
3179 /* Allocate .plt and .got entries, and space for local symbols. */
3180 htab_traverse (htab
->loc_hash_table
,
3181 elf_x86_64_allocate_local_dynrelocs
,
3184 /* For every jump slot reserved in the sgotplt, reloc_count is
3185 incremented. However, when we reserve space for TLS descriptors,
3186 it's not incremented, so in order to compute the space reserved
3187 for them, it suffices to multiply the reloc count by the jump
3190 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3191 so that R_X86_64_IRELATIVE entries come last. */
3192 if (htab
->elf
.srelplt
)
3194 htab
->sgotplt_jump_table_size
3195 = elf_x86_64_compute_jump_table_size (htab
);
3196 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3198 else if (htab
->elf
.irelplt
)
3199 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3201 if (htab
->tlsdesc_plt
)
3203 /* If we're not using lazy TLS relocations, don't generate the
3204 PLT and GOT entries they require. */
3205 if ((info
->flags
& DF_BIND_NOW
))
3206 htab
->tlsdesc_plt
= 0;
3209 htab
->tlsdesc_got
= htab
->elf
.sgot
->size
;
3210 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
3211 /* Reserve room for the initial entry.
3212 FIXME: we could probably do away with it in this case. */
3213 if (htab
->elf
.splt
->size
== 0)
3214 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3215 htab
->tlsdesc_plt
= htab
->elf
.splt
->size
;
3216 htab
->elf
.splt
->size
+= GET_PLT_ENTRY_SIZE (output_bfd
);
3220 if (htab
->elf
.sgotplt
)
3222 /* Don't allocate .got.plt section if there are no GOT nor PLT
3223 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3224 if ((htab
->elf
.hgot
== NULL
3225 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3226 && (htab
->elf
.sgotplt
->size
3227 == get_elf_backend_data (output_bfd
)->got_header_size
)
3228 && (htab
->elf
.splt
== NULL
3229 || htab
->elf
.splt
->size
== 0)
3230 && (htab
->elf
.sgot
== NULL
3231 || htab
->elf
.sgot
->size
== 0)
3232 && (htab
->elf
.iplt
== NULL
3233 || htab
->elf
.iplt
->size
== 0)
3234 && (htab
->elf
.igotplt
== NULL
3235 || htab
->elf
.igotplt
->size
== 0))
3236 htab
->elf
.sgotplt
->size
= 0;
3239 if (htab
->plt_eh_frame
!= NULL
3240 && htab
->elf
.splt
!= NULL
3241 && htab
->elf
.splt
->size
!= 0
3242 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3243 && _bfd_elf_eh_frame_present (info
))
3245 const struct elf_x86_64_backend_data
*arch_data
3246 = get_elf_x86_64_arch_data (bed
);
3247 htab
->plt_eh_frame
->size
= arch_data
->eh_frame_plt_size
;
3250 /* We now have determined the sizes of the various dynamic sections.
3251 Allocate memory for them. */
3253 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3255 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3258 if (s
== htab
->elf
.splt
3259 || s
== htab
->elf
.sgot
3260 || s
== htab
->elf
.sgotplt
3261 || s
== htab
->elf
.iplt
3262 || s
== htab
->elf
.igotplt
3263 || s
== htab
->plt_bnd
3264 || s
== htab
->plt_got
3265 || s
== htab
->plt_eh_frame
3266 || s
== htab
->sdynbss
)
3268 /* Strip this section if we don't need it; see the
3271 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
3273 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
3276 /* We use the reloc_count field as a counter if we need
3277 to copy relocs into the output file. */
3278 if (s
!= htab
->elf
.srelplt
)
3283 /* It's not one of our sections, so don't allocate space. */
3289 /* If we don't need this section, strip it from the
3290 output file. This is mostly to handle .rela.bss and
3291 .rela.plt. We must create both sections in
3292 create_dynamic_sections, because they must be created
3293 before the linker maps input sections to output
3294 sections. The linker does that before
3295 adjust_dynamic_symbol is called, and it is that
3296 function which decides whether anything needs to go
3297 into these sections. */
3299 s
->flags
|= SEC_EXCLUDE
;
3303 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3306 /* Allocate memory for the section contents. We use bfd_zalloc
3307 here in case unused entries are not reclaimed before the
3308 section's contents are written out. This should not happen,
3309 but this way if it does, we get a R_X86_64_NONE reloc instead
3311 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
3312 if (s
->contents
== NULL
)
3316 if (htab
->plt_eh_frame
!= NULL
3317 && htab
->plt_eh_frame
->contents
!= NULL
)
3319 const struct elf_x86_64_backend_data
*arch_data
3320 = get_elf_x86_64_arch_data (bed
);
3322 memcpy (htab
->plt_eh_frame
->contents
,
3323 arch_data
->eh_frame_plt
, htab
->plt_eh_frame
->size
);
3324 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3325 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3328 if (htab
->elf
.dynamic_sections_created
)
3330 /* Add some entries to the .dynamic section. We fill in the
3331 values later, in elf_x86_64_finish_dynamic_sections, but we
3332 must add the entries now so that we get the correct size for
3333 the .dynamic section. The DT_DEBUG entry is filled in by the
3334 dynamic linker and used by the debugger. */
3335 #define add_dynamic_entry(TAG, VAL) \
3336 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3338 if (info
->executable
)
3340 if (!add_dynamic_entry (DT_DEBUG
, 0))
3344 if (htab
->elf
.splt
->size
!= 0)
3346 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3347 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3348 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
3349 || !add_dynamic_entry (DT_JMPREL
, 0))
3352 if (htab
->tlsdesc_plt
3353 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
3354 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
3360 if (!add_dynamic_entry (DT_RELA
, 0)
3361 || !add_dynamic_entry (DT_RELASZ
, 0)
3362 || !add_dynamic_entry (DT_RELAENT
, bed
->s
->sizeof_rela
))
3365 /* If any dynamic relocs apply to a read-only section,
3366 then we need a DT_TEXTREL entry. */
3367 if ((info
->flags
& DF_TEXTREL
) == 0)
3368 elf_link_hash_traverse (&htab
->elf
,
3369 elf_x86_64_readonly_dynrelocs
,
3372 if ((info
->flags
& DF_TEXTREL
) != 0)
3374 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3379 #undef add_dynamic_entry
3385 elf_x86_64_always_size_sections (bfd
*output_bfd
,
3386 struct bfd_link_info
*info
)
3388 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3392 struct elf_link_hash_entry
*tlsbase
;
3394 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3395 "_TLS_MODULE_BASE_",
3396 FALSE
, FALSE
, FALSE
);
3398 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3400 struct elf_x86_64_link_hash_table
*htab
;
3401 struct bfd_link_hash_entry
*bh
= NULL
;
3402 const struct elf_backend_data
*bed
3403 = get_elf_backend_data (output_bfd
);
3405 htab
= elf_x86_64_hash_table (info
);
3409 if (!(_bfd_generic_link_add_one_symbol
3410 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3411 tls_sec
, 0, NULL
, FALSE
,
3412 bed
->collect
, &bh
)))
3415 htab
->tls_module_base
= bh
;
3417 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3418 tlsbase
->def_regular
= 1;
3419 tlsbase
->other
= STV_HIDDEN
;
3420 tlsbase
->root
.linker_def
= 1;
3421 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3428 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3429 executables. Rather than setting it to the beginning of the TLS
3430 section, we have to set it to the end. This function may be called
3431 multiple times, it is idempotent. */
3434 elf_x86_64_set_tls_module_base (struct bfd_link_info
*info
)
3436 struct elf_x86_64_link_hash_table
*htab
;
3437 struct bfd_link_hash_entry
*base
;
3439 if (!info
->executable
)
3442 htab
= elf_x86_64_hash_table (info
);
3446 base
= htab
->tls_module_base
;
3450 base
->u
.def
.value
= htab
->elf
.tls_size
;
3453 /* Return the base VMA address which should be subtracted from real addresses
3454 when resolving @dtpoff relocation.
3455 This is PT_TLS segment p_vaddr. */
3458 elf_x86_64_dtpoff_base (struct bfd_link_info
*info
)
3460 /* If tls_sec is NULL, we should have signalled an error already. */
3461 if (elf_hash_table (info
)->tls_sec
== NULL
)
3463 return elf_hash_table (info
)->tls_sec
->vma
;
3466 /* Return the relocation value for @tpoff relocation
3467 if STT_TLS virtual address is ADDRESS. */
3470 elf_x86_64_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3472 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3473 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3474 bfd_vma static_tls_size
;
3476 /* If tls_segment is NULL, we should have signalled an error already. */
3477 if (htab
->tls_sec
== NULL
)
3480 /* Consider special static TLS alignment requirements. */
3481 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3482 return address
- static_tls_size
- htab
->tls_sec
->vma
;
3485 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3489 is_32bit_relative_branch (bfd_byte
*contents
, bfd_vma offset
)
3491 /* Opcode Instruction
3494 0x0f 0x8x conditional jump */
3496 && (contents
[offset
- 1] == 0xe8
3497 || contents
[offset
- 1] == 0xe9))
3499 && contents
[offset
- 2] == 0x0f
3500 && (contents
[offset
- 1] & 0xf0) == 0x80));
3503 /* Relocate an x86_64 ELF section. */
3506 elf_x86_64_relocate_section (bfd
*output_bfd
,
3507 struct bfd_link_info
*info
,
3509 asection
*input_section
,
3511 Elf_Internal_Rela
*relocs
,
3512 Elf_Internal_Sym
*local_syms
,
3513 asection
**local_sections
)
3515 struct elf_x86_64_link_hash_table
*htab
;
3516 Elf_Internal_Shdr
*symtab_hdr
;
3517 struct elf_link_hash_entry
**sym_hashes
;
3518 bfd_vma
*local_got_offsets
;
3519 bfd_vma
*local_tlsdesc_gotents
;
3520 Elf_Internal_Rela
*rel
;
3521 Elf_Internal_Rela
*relend
;
3522 const unsigned int plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
3524 BFD_ASSERT (is_x86_64_elf (input_bfd
));
3526 htab
= elf_x86_64_hash_table (info
);
3529 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3530 sym_hashes
= elf_sym_hashes (input_bfd
);
3531 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3532 local_tlsdesc_gotents
= elf_x86_64_local_tlsdesc_gotent (input_bfd
);
3534 elf_x86_64_set_tls_module_base (info
);
3537 relend
= relocs
+ input_section
->reloc_count
;
3538 for (; rel
< relend
; rel
++)
3540 unsigned int r_type
;
3541 reloc_howto_type
*howto
;
3542 unsigned long r_symndx
;
3543 struct elf_link_hash_entry
*h
;
3544 struct elf_x86_64_link_hash_entry
*eh
;
3545 Elf_Internal_Sym
*sym
;
3547 bfd_vma off
, offplt
, plt_offset
;
3549 bfd_boolean unresolved_reloc
;
3550 bfd_reloc_status_type r
;
3552 asection
*base_got
, *resolved_plt
;
3555 r_type
= ELF32_R_TYPE (rel
->r_info
);
3556 if (r_type
== (int) R_X86_64_GNU_VTINHERIT
3557 || r_type
== (int) R_X86_64_GNU_VTENTRY
)
3560 if (r_type
>= (int) R_X86_64_standard
)
3562 (*_bfd_error_handler
)
3563 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3564 input_bfd
, input_section
, r_type
);
3565 bfd_set_error (bfd_error_bad_value
);
3569 if (r_type
!= (int) R_X86_64_32
3570 || ABI_64_P (output_bfd
))
3571 howto
= x86_64_elf_howto_table
+ r_type
;
3573 howto
= (x86_64_elf_howto_table
3574 + ARRAY_SIZE (x86_64_elf_howto_table
) - 1);
3575 r_symndx
= htab
->r_sym (rel
->r_info
);
3579 unresolved_reloc
= FALSE
;
3580 if (r_symndx
< symtab_hdr
->sh_info
)
3582 sym
= local_syms
+ r_symndx
;
3583 sec
= local_sections
[r_symndx
];
3585 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
,
3587 st_size
= sym
->st_size
;
3589 /* Relocate against local STT_GNU_IFUNC symbol. */
3590 if (!info
->relocatable
3591 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3593 h
= elf_x86_64_get_local_sym_hash (htab
, input_bfd
,
3598 /* Set STT_GNU_IFUNC symbol value. */
3599 h
->root
.u
.def
.value
= sym
->st_value
;
3600 h
->root
.u
.def
.section
= sec
;
3605 bfd_boolean warned ATTRIBUTE_UNUSED
;
3606 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3608 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3609 r_symndx
, symtab_hdr
, sym_hashes
,
3611 unresolved_reloc
, warned
, ignored
);
3615 if (sec
!= NULL
&& discarded_section (sec
))
3616 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3617 rel
, 1, relend
, howto
, 0, contents
);
3619 if (info
->relocatable
)
3622 if (rel
->r_addend
== 0 && !ABI_64_P (output_bfd
))
3624 if (r_type
== R_X86_64_64
)
3626 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3627 zero-extend it to 64bit if addend is zero. */
3628 r_type
= R_X86_64_32
;
3629 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3631 else if (r_type
== R_X86_64_SIZE64
)
3633 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3634 zero-extend it to 64bit if addend is zero. */
3635 r_type
= R_X86_64_SIZE32
;
3636 memset (contents
+ rel
->r_offset
+ 4, 0, 4);
3640 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
3642 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3643 it here if it is defined in a non-shared object. */
3645 && h
->type
== STT_GNU_IFUNC
3651 if ((input_section
->flags
& SEC_ALLOC
) == 0
3652 || h
->plt
.offset
== (bfd_vma
) -1)
3655 /* STT_GNU_IFUNC symbol must go through PLT. */
3656 if (htab
->elf
.splt
!= NULL
)
3658 if (htab
->plt_bnd
!= NULL
)
3660 resolved_plt
= htab
->plt_bnd
;
3661 plt_offset
= eh
->plt_bnd
.offset
;
3665 resolved_plt
= htab
->elf
.splt
;
3666 plt_offset
= h
->plt
.offset
;
3671 resolved_plt
= htab
->elf
.iplt
;
3672 plt_offset
= h
->plt
.offset
;
3675 relocation
= (resolved_plt
->output_section
->vma
3676 + resolved_plt
->output_offset
+ plt_offset
);
3681 if (h
->root
.root
.string
)
3682 name
= h
->root
.root
.string
;
3684 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3686 (*_bfd_error_handler
)
3687 (_("%B: relocation %s against STT_GNU_IFUNC "
3688 "symbol `%s' isn't handled by %s"), input_bfd
,
3689 x86_64_elf_howto_table
[r_type
].name
,
3690 name
, __FUNCTION__
);
3691 bfd_set_error (bfd_error_bad_value
);
3700 if (ABI_64_P (output_bfd
))
3704 if (rel
->r_addend
!= 0)
3706 if (h
->root
.root
.string
)
3707 name
= h
->root
.root
.string
;
3709 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
3711 (*_bfd_error_handler
)
3712 (_("%B: relocation %s against STT_GNU_IFUNC "
3713 "symbol `%s' has non-zero addend: %d"),
3714 input_bfd
, x86_64_elf_howto_table
[r_type
].name
,
3715 name
, rel
->r_addend
);
3716 bfd_set_error (bfd_error_bad_value
);
3720 /* Generate dynamic relcoation only when there is a
3721 non-GOT reference in a shared object. */
3722 if (info
->shared
&& h
->non_got_ref
)
3724 Elf_Internal_Rela outrel
;
3727 /* Need a dynamic relocation to get the real function
3729 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
3733 if (outrel
.r_offset
== (bfd_vma
) -1
3734 || outrel
.r_offset
== (bfd_vma
) -2)
3737 outrel
.r_offset
+= (input_section
->output_section
->vma
3738 + input_section
->output_offset
);
3740 if (h
->dynindx
== -1
3742 || info
->executable
)
3744 /* This symbol is resolved locally. */
3745 outrel
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
3746 outrel
.r_addend
= (h
->root
.u
.def
.value
3747 + h
->root
.u
.def
.section
->output_section
->vma
3748 + h
->root
.u
.def
.section
->output_offset
);
3752 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
3753 outrel
.r_addend
= 0;
3756 sreloc
= htab
->elf
.irelifunc
;
3757 elf_append_rela (output_bfd
, sreloc
, &outrel
);
3759 /* If this reloc is against an external symbol, we
3760 do not want to fiddle with the addend. Otherwise,
3761 we need to include the symbol value so that it
3762 becomes an addend for the dynamic reloc. For an
3763 internal symbol, we have updated addend. */
3768 case R_X86_64_PC32_BND
:
3770 case R_X86_64_PLT32
:
3771 case R_X86_64_PLT32_BND
:
3774 case R_X86_64_GOTPCREL
:
3775 case R_X86_64_GOTPCREL64
:
3776 base_got
= htab
->elf
.sgot
;
3777 off
= h
->got
.offset
;
3779 if (base_got
== NULL
)
3782 if (off
== (bfd_vma
) -1)
3784 /* We can't use h->got.offset here to save state, or
3785 even just remember the offset, as finish_dynamic_symbol
3786 would use that as offset into .got. */
3788 if (htab
->elf
.splt
!= NULL
)
3790 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3791 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3792 base_got
= htab
->elf
.sgotplt
;
3796 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3797 off
= plt_index
* GOT_ENTRY_SIZE
;
3798 base_got
= htab
->elf
.igotplt
;
3801 if (h
->dynindx
== -1
3805 /* This references the local defitionion. We must
3806 initialize this entry in the global offset table.
3807 Since the offset must always be a multiple of 8,
3808 we use the least significant bit to record
3809 whether we have initialized it already.
3811 When doing a dynamic link, we create a .rela.got
3812 relocation entry to initialize the value. This
3813 is done in the finish_dynamic_symbol routine. */
3818 bfd_put_64 (output_bfd
, relocation
,
3819 base_got
->contents
+ off
);
3820 /* Note that this is harmless for the GOTPLT64
3821 case, as -1 | 1 still is -1. */
3827 relocation
= (base_got
->output_section
->vma
3828 + base_got
->output_offset
+ off
);
3834 /* When generating a shared object, the relocations handled here are
3835 copied into the output file to be resolved at run time. */
3838 case R_X86_64_GOT32
:
3839 case R_X86_64_GOT64
:
3840 /* Relocation is to the entry for this symbol in the global
3842 case R_X86_64_GOTPCREL
:
3843 case R_X86_64_GOTPCREL64
:
3844 /* Use global offset table entry as symbol value. */
3845 case R_X86_64_GOTPLT64
:
3846 /* This is obsolete and treated the the same as GOT64. */
3847 base_got
= htab
->elf
.sgot
;
3849 if (htab
->elf
.sgot
== NULL
)
3856 off
= h
->got
.offset
;
3858 && h
->plt
.offset
!= (bfd_vma
)-1
3859 && off
== (bfd_vma
)-1)
3861 /* We can't use h->got.offset here to save
3862 state, or even just remember the offset, as
3863 finish_dynamic_symbol would use that as offset into
3865 bfd_vma plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3866 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3867 base_got
= htab
->elf
.sgotplt
;
3870 dyn
= htab
->elf
.dynamic_sections_created
;
3872 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3874 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3875 || (ELF_ST_VISIBILITY (h
->other
)
3876 && h
->root
.type
== bfd_link_hash_undefweak
))
3878 /* This is actually a static link, or it is a -Bsymbolic
3879 link and the symbol is defined locally, or the symbol
3880 was forced to be local because of a version file. We
3881 must initialize this entry in the global offset table.
3882 Since the offset must always be a multiple of 8, we
3883 use the least significant bit to record whether we
3884 have initialized it already.
3886 When doing a dynamic link, we create a .rela.got
3887 relocation entry to initialize the value. This is
3888 done in the finish_dynamic_symbol routine. */
3893 bfd_put_64 (output_bfd
, relocation
,
3894 base_got
->contents
+ off
);
3895 /* Note that this is harmless for the GOTPLT64 case,
3896 as -1 | 1 still is -1. */
3901 unresolved_reloc
= FALSE
;
3905 if (local_got_offsets
== NULL
)
3908 off
= local_got_offsets
[r_symndx
];
3910 /* The offset must always be a multiple of 8. We use
3911 the least significant bit to record whether we have
3912 already generated the necessary reloc. */
3917 bfd_put_64 (output_bfd
, relocation
,
3918 base_got
->contents
+ off
);
3923 Elf_Internal_Rela outrel
;
3925 /* We need to generate a R_X86_64_RELATIVE reloc
3926 for the dynamic linker. */
3927 s
= htab
->elf
.srelgot
;
3931 outrel
.r_offset
= (base_got
->output_section
->vma
3932 + base_got
->output_offset
3934 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
3935 outrel
.r_addend
= relocation
;
3936 elf_append_rela (output_bfd
, s
, &outrel
);
3939 local_got_offsets
[r_symndx
] |= 1;
3943 if (off
>= (bfd_vma
) -2)
3946 relocation
= base_got
->output_section
->vma
3947 + base_got
->output_offset
+ off
;
3948 if (r_type
!= R_X86_64_GOTPCREL
&& r_type
!= R_X86_64_GOTPCREL64
)
3949 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3950 - htab
->elf
.sgotplt
->output_offset
;
3954 case R_X86_64_GOTOFF64
:
3955 /* Relocation is relative to the start of the global offset
3958 /* Check to make sure it isn't a protected function or data
3959 symbol for shared library since it may not be local when
3960 used as function address or with copy relocation. */
3961 if (!info
->executable
3963 && !SYMBOLIC_BIND (info
, h
)
3965 && (h
->type
== STT_FUNC
3966 || h
->type
== STT_OBJECT
)
3967 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3969 (*_bfd_error_handler
)
3970 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
3972 h
->type
== STT_FUNC
? "function" : "data",
3973 h
->root
.root
.string
);
3974 bfd_set_error (bfd_error_bad_value
);
3978 /* Note that sgot is not involved in this
3979 calculation. We always want the start of .got.plt. If we
3980 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3981 permitted by the ABI, we might have to change this
3983 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3984 + htab
->elf
.sgotplt
->output_offset
;
3987 case R_X86_64_GOTPC32
:
3988 case R_X86_64_GOTPC64
:
3989 /* Use global offset table as symbol value. */
3990 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3991 + htab
->elf
.sgotplt
->output_offset
;
3992 unresolved_reloc
= FALSE
;
3995 case R_X86_64_PLTOFF64
:
3996 /* Relocation is PLT entry relative to GOT. For local
3997 symbols it's the symbol itself relative to GOT. */
3999 /* See PLT32 handling. */
4000 && h
->plt
.offset
!= (bfd_vma
) -1
4001 && htab
->elf
.splt
!= NULL
)
4003 if (htab
->plt_bnd
!= NULL
)
4005 resolved_plt
= htab
->plt_bnd
;
4006 plt_offset
= eh
->plt_bnd
.offset
;
4010 resolved_plt
= htab
->elf
.splt
;
4011 plt_offset
= h
->plt
.offset
;
4014 relocation
= (resolved_plt
->output_section
->vma
4015 + resolved_plt
->output_offset
4017 unresolved_reloc
= FALSE
;
4020 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4021 + htab
->elf
.sgotplt
->output_offset
;
4024 case R_X86_64_PLT32
:
4025 case R_X86_64_PLT32_BND
:
4026 /* Relocation is to the entry for this symbol in the
4027 procedure linkage table. */
4029 /* Resolve a PLT32 reloc against a local symbol directly,
4030 without using the procedure linkage table. */
4034 if ((h
->plt
.offset
== (bfd_vma
) -1
4035 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4036 || htab
->elf
.splt
== NULL
)
4038 /* We didn't make a PLT entry for this symbol. This
4039 happens when statically linking PIC code, or when
4040 using -Bsymbolic. */
4044 if (h
->plt
.offset
!= (bfd_vma
) -1)
4046 if (htab
->plt_bnd
!= NULL
)
4048 resolved_plt
= htab
->plt_bnd
;
4049 plt_offset
= eh
->plt_bnd
.offset
;
4053 resolved_plt
= htab
->elf
.splt
;
4054 plt_offset
= h
->plt
.offset
;
4059 /* Use the GOT PLT. */
4060 resolved_plt
= htab
->plt_got
;
4061 plt_offset
= eh
->plt_got
.offset
;
4064 relocation
= (resolved_plt
->output_section
->vma
4065 + resolved_plt
->output_offset
4067 unresolved_reloc
= FALSE
;
4070 case R_X86_64_SIZE32
:
4071 case R_X86_64_SIZE64
:
4072 /* Set to symbol size. */
4073 relocation
= st_size
;
4079 case R_X86_64_PC32_BND
:
4080 /* Don't complain about -fPIC if the symbol is undefined when
4081 building executable. */
4083 && (input_section
->flags
& SEC_ALLOC
) != 0
4084 && (input_section
->flags
& SEC_READONLY
) != 0
4086 && !(info
->executable
4087 && h
->root
.type
== bfd_link_hash_undefined
))
4089 bfd_boolean fail
= FALSE
;
4091 = ((r_type
== R_X86_64_PC32
4092 || r_type
== R_X86_64_PC32_BND
)
4093 && is_32bit_relative_branch (contents
, rel
->r_offset
));
4095 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
4097 /* Symbol is referenced locally. Make sure it is
4098 defined locally or for a branch. */
4099 fail
= !h
->def_regular
&& !branch
;
4101 else if (!(info
->executable
4102 && (h
->needs_copy
|| eh
->needs_copy
)))
4104 /* Symbol doesn't need copy reloc and isn't referenced
4105 locally. We only allow branch to symbol with
4106 non-default visibility. */
4108 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
);
4115 const char *pic
= "";
4117 switch (ELF_ST_VISIBILITY (h
->other
))
4120 v
= _("hidden symbol");
4123 v
= _("internal symbol");
4126 v
= _("protected symbol");
4130 pic
= _("; recompile with -fPIC");
4135 fmt
= _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4137 fmt
= _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4139 (*_bfd_error_handler
) (fmt
, input_bfd
,
4140 x86_64_elf_howto_table
[r_type
].name
,
4141 v
, h
->root
.root
.string
, pic
);
4142 bfd_set_error (bfd_error_bad_value
);
4153 /* FIXME: The ABI says the linker should make sure the value is
4154 the same when it's zeroextended to 64 bit. */
4157 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4160 /* Don't copy a pc-relative relocation into the output file
4161 if the symbol needs copy reloc or the symbol is undefined
4162 when building executable. */
4164 && !(info
->executable
4168 || h
->root
.type
== bfd_link_hash_undefined
)
4169 && IS_X86_64_PCREL_TYPE (r_type
))
4171 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4172 || h
->root
.type
!= bfd_link_hash_undefweak
)
4173 && ((! IS_X86_64_PCREL_TYPE (r_type
)
4174 && r_type
!= R_X86_64_SIZE32
4175 && r_type
!= R_X86_64_SIZE64
)
4176 || ! SYMBOL_CALLS_LOCAL (info
, h
)))
4177 || (ELIMINATE_COPY_RELOCS
4184 || h
->root
.type
== bfd_link_hash_undefweak
4185 || h
->root
.type
== bfd_link_hash_undefined
)))
4187 Elf_Internal_Rela outrel
;
4188 bfd_boolean skip
, relocate
;
4191 /* When generating a shared object, these relocations
4192 are copied into the output file to be resolved at run
4198 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4200 if (outrel
.r_offset
== (bfd_vma
) -1)
4202 else if (outrel
.r_offset
== (bfd_vma
) -2)
4203 skip
= TRUE
, relocate
= TRUE
;
4205 outrel
.r_offset
+= (input_section
->output_section
->vma
4206 + input_section
->output_offset
);
4209 memset (&outrel
, 0, sizeof outrel
);
4211 /* h->dynindx may be -1 if this symbol was marked to
4215 && (IS_X86_64_PCREL_TYPE (r_type
)
4217 || ! SYMBOLIC_BIND (info
, h
)
4218 || ! h
->def_regular
))
4220 outrel
.r_info
= htab
->r_info (h
->dynindx
, r_type
);
4221 outrel
.r_addend
= rel
->r_addend
;
4225 /* This symbol is local, or marked to become local. */
4226 if (r_type
== htab
->pointer_r_type
)
4229 outrel
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
4230 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4232 else if (r_type
== R_X86_64_64
4233 && !ABI_64_P (output_bfd
))
4236 outrel
.r_info
= htab
->r_info (0,
4237 R_X86_64_RELATIVE64
);
4238 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4239 /* Check addend overflow. */
4240 if ((outrel
.r_addend
& 0x80000000)
4241 != (rel
->r_addend
& 0x80000000))
4244 int addend
= rel
->r_addend
;
4245 if (h
&& h
->root
.root
.string
)
4246 name
= h
->root
.root
.string
;
4248 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
4251 (*_bfd_error_handler
)
4252 (_("%B: addend -0x%x in relocation %s against "
4253 "symbol `%s' at 0x%lx in section `%A' is "
4255 input_bfd
, input_section
, addend
,
4256 x86_64_elf_howto_table
[r_type
].name
,
4257 name
, (unsigned long) rel
->r_offset
);
4259 (*_bfd_error_handler
)
4260 (_("%B: addend 0x%x in relocation %s against "
4261 "symbol `%s' at 0x%lx in section `%A' is "
4263 input_bfd
, input_section
, addend
,
4264 x86_64_elf_howto_table
[r_type
].name
,
4265 name
, (unsigned long) rel
->r_offset
);
4266 bfd_set_error (bfd_error_bad_value
);
4274 if (bfd_is_abs_section (sec
))
4276 else if (sec
== NULL
|| sec
->owner
== NULL
)
4278 bfd_set_error (bfd_error_bad_value
);
4285 /* We are turning this relocation into one
4286 against a section symbol. It would be
4287 proper to subtract the symbol's value,
4288 osec->vma, from the emitted reloc addend,
4289 but ld.so expects buggy relocs. */
4290 osec
= sec
->output_section
;
4291 sindx
= elf_section_data (osec
)->dynindx
;
4294 asection
*oi
= htab
->elf
.text_index_section
;
4295 sindx
= elf_section_data (oi
)->dynindx
;
4297 BFD_ASSERT (sindx
!= 0);
4300 outrel
.r_info
= htab
->r_info (sindx
, r_type
);
4301 outrel
.r_addend
= relocation
+ rel
->r_addend
;
4305 sreloc
= elf_section_data (input_section
)->sreloc
;
4307 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4309 r
= bfd_reloc_notsupported
;
4310 goto check_relocation_error
;
4313 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4315 /* If this reloc is against an external symbol, we do
4316 not want to fiddle with the addend. Otherwise, we
4317 need to include the symbol value so that it becomes
4318 an addend for the dynamic reloc. */
4325 case R_X86_64_TLSGD
:
4326 case R_X86_64_GOTPC32_TLSDESC
:
4327 case R_X86_64_TLSDESC_CALL
:
4328 case R_X86_64_GOTTPOFF
:
4329 tls_type
= GOT_UNKNOWN
;
4330 if (h
== NULL
&& local_got_offsets
)
4331 tls_type
= elf_x86_64_local_got_tls_type (input_bfd
) [r_symndx
];
4333 tls_type
= elf_x86_64_hash_entry (h
)->tls_type
;
4335 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4336 input_section
, contents
,
4337 symtab_hdr
, sym_hashes
,
4338 &r_type
, tls_type
, rel
,
4339 relend
, h
, r_symndx
))
4342 if (r_type
== R_X86_64_TPOFF32
)
4344 bfd_vma roff
= rel
->r_offset
;
4346 BFD_ASSERT (! unresolved_reloc
);
4348 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4350 /* GD->LE transition. For 64bit, change
4351 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4352 .word 0x6666; rex64; call __tls_get_addr
4355 leaq foo@tpoff(%rax), %rax
4357 leaq foo@tlsgd(%rip), %rdi
4358 .word 0x6666; rex64; call __tls_get_addr
4361 leaq foo@tpoff(%rax), %rax
4362 For largepic, change:
4363 leaq foo@tlsgd(%rip), %rdi
4364 movabsq $__tls_get_addr@pltoff, %rax
4369 leaq foo@tpoff(%rax), %rax
4370 nopw 0x0(%rax,%rax,1) */
4372 if (ABI_64_P (output_bfd
)
4373 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4375 memcpy (contents
+ roff
- 3,
4376 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4377 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4380 else if (ABI_64_P (output_bfd
))
4381 memcpy (contents
+ roff
- 4,
4382 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4385 memcpy (contents
+ roff
- 3,
4386 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4388 bfd_put_32 (output_bfd
,
4389 elf_x86_64_tpoff (info
, relocation
),
4390 contents
+ roff
+ 8 + largepic
);
4391 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4395 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4397 /* GDesc -> LE transition.
4398 It's originally something like:
4399 leaq x@tlsdesc(%rip), %rax
4402 movl $x@tpoff, %rax. */
4404 unsigned int val
, type
;
4406 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4407 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4408 bfd_put_8 (output_bfd
, 0x48 | ((type
>> 2) & 1),
4409 contents
+ roff
- 3);
4410 bfd_put_8 (output_bfd
, 0xc7, contents
+ roff
- 2);
4411 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4412 contents
+ roff
- 1);
4413 bfd_put_32 (output_bfd
,
4414 elf_x86_64_tpoff (info
, relocation
),
4418 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4420 /* GDesc -> LE transition.
4425 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4426 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4429 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTTPOFF
)
4431 /* IE->LE transition:
4432 For 64bit, originally it can be one of:
4433 movq foo@gottpoff(%rip), %reg
4434 addq foo@gottpoff(%rip), %reg
4437 leaq foo(%reg), %reg
4439 For 32bit, originally it can be one of:
4440 movq foo@gottpoff(%rip), %reg
4441 addl foo@gottpoff(%rip), %reg
4444 leal foo(%reg), %reg
4447 unsigned int val
, type
, reg
;
4450 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 3);
4453 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
4454 reg
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4460 bfd_put_8 (output_bfd
, 0x49,
4461 contents
+ roff
- 3);
4462 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4463 bfd_put_8 (output_bfd
, 0x41,
4464 contents
+ roff
- 3);
4465 bfd_put_8 (output_bfd
, 0xc7,
4466 contents
+ roff
- 2);
4467 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4468 contents
+ roff
- 1);
4472 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4475 bfd_put_8 (output_bfd
, 0x49,
4476 contents
+ roff
- 3);
4477 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4478 bfd_put_8 (output_bfd
, 0x41,
4479 contents
+ roff
- 3);
4480 bfd_put_8 (output_bfd
, 0x81,
4481 contents
+ roff
- 2);
4482 bfd_put_8 (output_bfd
, 0xc0 | reg
,
4483 contents
+ roff
- 1);
4487 /* addq/addl -> leaq/leal */
4489 bfd_put_8 (output_bfd
, 0x4d,
4490 contents
+ roff
- 3);
4491 else if (!ABI_64_P (output_bfd
) && val
== 0x44)
4492 bfd_put_8 (output_bfd
, 0x45,
4493 contents
+ roff
- 3);
4494 bfd_put_8 (output_bfd
, 0x8d,
4495 contents
+ roff
- 2);
4496 bfd_put_8 (output_bfd
, 0x80 | reg
| (reg
<< 3),
4497 contents
+ roff
- 1);
4499 bfd_put_32 (output_bfd
,
4500 elf_x86_64_tpoff (info
, relocation
),
4508 if (htab
->elf
.sgot
== NULL
)
4513 off
= h
->got
.offset
;
4514 offplt
= elf_x86_64_hash_entry (h
)->tlsdesc_got
;
4518 if (local_got_offsets
== NULL
)
4521 off
= local_got_offsets
[r_symndx
];
4522 offplt
= local_tlsdesc_gotents
[r_symndx
];
4529 Elf_Internal_Rela outrel
;
4533 if (htab
->elf
.srelgot
== NULL
)
4536 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4538 if (GOT_TLS_GDESC_P (tls_type
))
4540 outrel
.r_info
= htab
->r_info (indx
, R_X86_64_TLSDESC
);
4541 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
4542 + 2 * GOT_ENTRY_SIZE
<= htab
->elf
.sgotplt
->size
);
4543 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4544 + htab
->elf
.sgotplt
->output_offset
4546 + htab
->sgotplt_jump_table_size
);
4547 sreloc
= htab
->elf
.srelplt
;
4549 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4551 outrel
.r_addend
= 0;
4552 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4555 sreloc
= htab
->elf
.srelgot
;
4557 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4558 + htab
->elf
.sgot
->output_offset
+ off
);
4560 if (GOT_TLS_GD_P (tls_type
))
4561 dr_type
= R_X86_64_DTPMOD64
;
4562 else if (GOT_TLS_GDESC_P (tls_type
))
4565 dr_type
= R_X86_64_TPOFF64
;
4567 bfd_put_64 (output_bfd
, 0, htab
->elf
.sgot
->contents
+ off
);
4568 outrel
.r_addend
= 0;
4569 if ((dr_type
== R_X86_64_TPOFF64
4570 || dr_type
== R_X86_64_TLSDESC
) && indx
== 0)
4571 outrel
.r_addend
= relocation
- elf_x86_64_dtpoff_base (info
);
4572 outrel
.r_info
= htab
->r_info (indx
, dr_type
);
4574 elf_append_rela (output_bfd
, sreloc
, &outrel
);
4576 if (GOT_TLS_GD_P (tls_type
))
4580 BFD_ASSERT (! unresolved_reloc
);
4581 bfd_put_64 (output_bfd
,
4582 relocation
- elf_x86_64_dtpoff_base (info
),
4583 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4587 bfd_put_64 (output_bfd
, 0,
4588 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4589 outrel
.r_info
= htab
->r_info (indx
,
4591 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
4592 elf_append_rela (output_bfd
, sreloc
,
4601 local_got_offsets
[r_symndx
] |= 1;
4604 if (off
>= (bfd_vma
) -2
4605 && ! GOT_TLS_GDESC_P (tls_type
))
4607 if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4609 if (r_type
== R_X86_64_GOTPC32_TLSDESC
4610 || r_type
== R_X86_64_TLSDESC_CALL
)
4611 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4612 + htab
->elf
.sgotplt
->output_offset
4613 + offplt
+ htab
->sgotplt_jump_table_size
;
4615 relocation
= htab
->elf
.sgot
->output_section
->vma
4616 + htab
->elf
.sgot
->output_offset
+ off
;
4617 unresolved_reloc
= FALSE
;
4621 bfd_vma roff
= rel
->r_offset
;
4623 if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSGD
)
4625 /* GD->IE transition. For 64bit, change
4626 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4627 .word 0x6666; rex64; call __tls_get_addr@plt
4630 addq foo@gottpoff(%rip), %rax
4632 leaq foo@tlsgd(%rip), %rdi
4633 .word 0x6666; rex64; call __tls_get_addr@plt
4636 addq foo@gottpoff(%rip), %rax
4637 For largepic, change:
4638 leaq foo@tlsgd(%rip), %rdi
4639 movabsq $__tls_get_addr@pltoff, %rax
4644 addq foo@gottpoff(%rax), %rax
4645 nopw 0x0(%rax,%rax,1) */
4647 if (ABI_64_P (output_bfd
)
4648 && contents
[roff
+ 5] == (bfd_byte
) '\xb8')
4650 memcpy (contents
+ roff
- 3,
4651 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4652 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4655 else if (ABI_64_P (output_bfd
))
4656 memcpy (contents
+ roff
- 4,
4657 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4660 memcpy (contents
+ roff
- 3,
4661 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4664 relocation
= (htab
->elf
.sgot
->output_section
->vma
4665 + htab
->elf
.sgot
->output_offset
+ off
4668 - input_section
->output_section
->vma
4669 - input_section
->output_offset
4671 bfd_put_32 (output_bfd
, relocation
,
4672 contents
+ roff
+ 8 + largepic
);
4673 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4677 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_GOTPC32_TLSDESC
)
4679 /* GDesc -> IE transition.
4680 It's originally something like:
4681 leaq x@tlsdesc(%rip), %rax
4684 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4686 /* Now modify the instruction as appropriate. To
4687 turn a leaq into a movq in the form we use it, it
4688 suffices to change the second byte from 0x8d to
4690 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4692 bfd_put_32 (output_bfd
,
4693 htab
->elf
.sgot
->output_section
->vma
4694 + htab
->elf
.sgot
->output_offset
+ off
4696 - input_section
->output_section
->vma
4697 - input_section
->output_offset
4702 else if (ELF32_R_TYPE (rel
->r_info
) == R_X86_64_TLSDESC_CALL
)
4704 /* GDesc -> IE transition.
4711 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4712 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4720 case R_X86_64_TLSLD
:
4721 if (! elf_x86_64_tls_transition (info
, input_bfd
,
4722 input_section
, contents
,
4723 symtab_hdr
, sym_hashes
,
4724 &r_type
, GOT_UNKNOWN
,
4725 rel
, relend
, h
, r_symndx
))
4728 if (r_type
!= R_X86_64_TLSLD
)
4730 /* LD->LE transition:
4731 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4732 For 64bit, we change it into:
4733 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4734 For 32bit, we change it into:
4735 nopl 0x0(%rax); movl %fs:0, %eax.
4736 For largepic, change:
4737 leaq foo@tlsgd(%rip), %rdi
4738 movabsq $__tls_get_addr@pltoff, %rax
4742 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4745 BFD_ASSERT (r_type
== R_X86_64_TPOFF32
);
4746 if (ABI_64_P (output_bfd
)
4747 && contents
[rel
->r_offset
+ 5] == (bfd_byte
) '\xb8')
4748 memcpy (contents
+ rel
->r_offset
- 3,
4749 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4750 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4751 else if (ABI_64_P (output_bfd
))
4752 memcpy (contents
+ rel
->r_offset
- 3,
4753 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4755 memcpy (contents
+ rel
->r_offset
- 3,
4756 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4757 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4762 if (htab
->elf
.sgot
== NULL
)
4765 off
= htab
->tls_ld_got
.offset
;
4770 Elf_Internal_Rela outrel
;
4772 if (htab
->elf
.srelgot
== NULL
)
4775 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4776 + htab
->elf
.sgot
->output_offset
+ off
);
4778 bfd_put_64 (output_bfd
, 0,
4779 htab
->elf
.sgot
->contents
+ off
);
4780 bfd_put_64 (output_bfd
, 0,
4781 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
4782 outrel
.r_info
= htab
->r_info (0, R_X86_64_DTPMOD64
);
4783 outrel
.r_addend
= 0;
4784 elf_append_rela (output_bfd
, htab
->elf
.srelgot
,
4786 htab
->tls_ld_got
.offset
|= 1;
4788 relocation
= htab
->elf
.sgot
->output_section
->vma
4789 + htab
->elf
.sgot
->output_offset
+ off
;
4790 unresolved_reloc
= FALSE
;
4793 case R_X86_64_DTPOFF32
:
4794 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4795 relocation
-= elf_x86_64_dtpoff_base (info
);
4797 relocation
= elf_x86_64_tpoff (info
, relocation
);
4800 case R_X86_64_TPOFF32
:
4801 case R_X86_64_TPOFF64
:
4802 BFD_ASSERT (info
->executable
);
4803 relocation
= elf_x86_64_tpoff (info
, relocation
);
4806 case R_X86_64_DTPOFF64
:
4807 BFD_ASSERT ((input_section
->flags
& SEC_CODE
) == 0);
4808 relocation
-= elf_x86_64_dtpoff_base (info
);
4815 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4816 because such sections are not SEC_ALLOC and thus ld.so will
4817 not process them. */
4818 if (unresolved_reloc
4819 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4821 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4822 rel
->r_offset
) != (bfd_vma
) -1)
4824 (*_bfd_error_handler
)
4825 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4828 (long) rel
->r_offset
,
4830 h
->root
.root
.string
);
4835 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4836 contents
, rel
->r_offset
,
4837 relocation
, rel
->r_addend
);
4839 check_relocation_error
:
4840 if (r
!= bfd_reloc_ok
)
4845 name
= h
->root
.root
.string
;
4848 name
= bfd_elf_string_from_elf_section (input_bfd
,
4849 symtab_hdr
->sh_link
,
4854 name
= bfd_section_name (input_bfd
, sec
);
4857 if (r
== bfd_reloc_overflow
)
4859 if (! ((*info
->callbacks
->reloc_overflow
)
4860 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4861 (bfd_vma
) 0, input_bfd
, input_section
,
4867 (*_bfd_error_handler
)
4868 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4869 input_bfd
, input_section
,
4870 (long) rel
->r_offset
, name
, (int) r
);
4879 /* Finish up dynamic symbol handling. We set the contents of various
4880 dynamic sections here. */
4883 elf_x86_64_finish_dynamic_symbol (bfd
*output_bfd
,
4884 struct bfd_link_info
*info
,
4885 struct elf_link_hash_entry
*h
,
4886 Elf_Internal_Sym
*sym ATTRIBUTE_UNUSED
)
4888 struct elf_x86_64_link_hash_table
*htab
;
4889 const struct elf_x86_64_backend_data
*abed
;
4890 bfd_boolean use_plt_bnd
;
4891 struct elf_x86_64_link_hash_entry
*eh
;
4893 htab
= elf_x86_64_hash_table (info
);
4897 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4898 section only if there is .plt section. */
4899 use_plt_bnd
= htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
;
4901 ? &elf_x86_64_bnd_arch_bed
4902 : get_elf_x86_64_backend_data (output_bfd
));
4904 eh
= (struct elf_x86_64_link_hash_entry
*) h
;
4906 if (h
->plt
.offset
!= (bfd_vma
) -1)
4909 bfd_vma got_offset
, plt_offset
, plt_plt_offset
, plt_got_offset
;
4910 bfd_vma plt_plt_insn_end
, plt_got_insn_size
;
4911 Elf_Internal_Rela rela
;
4913 asection
*plt
, *gotplt
, *relplt
, *resolved_plt
;
4914 const struct elf_backend_data
*bed
;
4915 bfd_vma plt_got_pcrel_offset
;
4917 /* When building a static executable, use .iplt, .igot.plt and
4918 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4919 if (htab
->elf
.splt
!= NULL
)
4921 plt
= htab
->elf
.splt
;
4922 gotplt
= htab
->elf
.sgotplt
;
4923 relplt
= htab
->elf
.srelplt
;
4927 plt
= htab
->elf
.iplt
;
4928 gotplt
= htab
->elf
.igotplt
;
4929 relplt
= htab
->elf
.irelplt
;
4932 /* This symbol has an entry in the procedure linkage table. Set
4934 if ((h
->dynindx
== -1
4935 && !((h
->forced_local
|| info
->executable
)
4937 && h
->type
== STT_GNU_IFUNC
))
4943 /* Get the index in the procedure linkage table which
4944 corresponds to this symbol. This is the index of this symbol
4945 in all the symbols for which we are making plt entries. The
4946 first entry in the procedure linkage table is reserved.
4948 Get the offset into the .got table of the entry that
4949 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4950 bytes. The first three are reserved for the dynamic linker.
4952 For static executables, we don't reserve anything. */
4954 if (plt
== htab
->elf
.splt
)
4956 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
- 1;
4957 got_offset
= (got_offset
+ 3) * GOT_ENTRY_SIZE
;
4961 got_offset
= h
->plt
.offset
/ abed
->plt_entry_size
;
4962 got_offset
= got_offset
* GOT_ENTRY_SIZE
;
4965 plt_plt_insn_end
= abed
->plt_plt_insn_end
;
4966 plt_plt_offset
= abed
->plt_plt_offset
;
4967 plt_got_insn_size
= abed
->plt_got_insn_size
;
4968 plt_got_offset
= abed
->plt_got_offset
;
4971 /* Use the second PLT with BND relocations. */
4972 const bfd_byte
*plt_entry
, *plt2_entry
;
4974 if (eh
->has_bnd_reloc
)
4976 plt_entry
= elf_x86_64_bnd_plt_entry
;
4977 plt2_entry
= elf_x86_64_bnd_plt2_entry
;
4981 plt_entry
= elf_x86_64_legacy_plt_entry
;
4982 plt2_entry
= elf_x86_64_legacy_plt2_entry
;
4984 /* Subtract 1 since there is no BND prefix. */
4985 plt_plt_insn_end
-= 1;
4986 plt_plt_offset
-= 1;
4987 plt_got_insn_size
-= 1;
4988 plt_got_offset
-= 1;
4991 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry
)
4992 == sizeof (elf_x86_64_legacy_plt_entry
));
4994 /* Fill in the entry in the procedure linkage table. */
4995 memcpy (plt
->contents
+ h
->plt
.offset
,
4996 plt_entry
, sizeof (elf_x86_64_legacy_plt_entry
));
4997 /* Fill in the entry in the second PLT. */
4998 memcpy (htab
->plt_bnd
->contents
+ eh
->plt_bnd
.offset
,
4999 plt2_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5001 resolved_plt
= htab
->plt_bnd
;
5002 plt_offset
= eh
->plt_bnd
.offset
;
5006 /* Fill in the entry in the procedure linkage table. */
5007 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt_entry
,
5008 abed
->plt_entry_size
);
5011 plt_offset
= h
->plt
.offset
;
5014 /* Insert the relocation positions of the plt section. */
5016 /* Put offset the PC-relative instruction referring to the GOT entry,
5017 subtracting the size of that instruction. */
5018 plt_got_pcrel_offset
= (gotplt
->output_section
->vma
5019 + gotplt
->output_offset
5021 - resolved_plt
->output_section
->vma
5022 - resolved_plt
->output_offset
5024 - plt_got_insn_size
);
5026 /* Check PC-relative offset overflow in PLT entry. */
5027 if ((plt_got_pcrel_offset
+ 0x80000000) > 0xffffffff)
5028 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5029 output_bfd
, h
->root
.root
.string
);
5031 bfd_put_32 (output_bfd
, plt_got_pcrel_offset
,
5032 resolved_plt
->contents
+ plt_offset
+ plt_got_offset
);
5034 /* Fill in the entry in the global offset table, initially this
5035 points to the second part of the PLT entry. */
5036 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5037 + plt
->output_offset
5038 + h
->plt
.offset
+ abed
->plt_lazy_offset
),
5039 gotplt
->contents
+ got_offset
);
5041 /* Fill in the entry in the .rela.plt section. */
5042 rela
.r_offset
= (gotplt
->output_section
->vma
5043 + gotplt
->output_offset
5045 if (h
->dynindx
== -1
5046 || ((info
->executable
5047 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5049 && h
->type
== STT_GNU_IFUNC
))
5051 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5052 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5053 rela
.r_info
= htab
->r_info (0, R_X86_64_IRELATIVE
);
5054 rela
.r_addend
= (h
->root
.u
.def
.value
5055 + h
->root
.u
.def
.section
->output_section
->vma
5056 + h
->root
.u
.def
.section
->output_offset
);
5057 /* R_X86_64_IRELATIVE comes last. */
5058 plt_index
= htab
->next_irelative_index
--;
5062 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_JUMP_SLOT
);
5064 plt_index
= htab
->next_jump_slot_index
++;
5067 /* Don't fill PLT entry for static executables. */
5068 if (plt
== htab
->elf
.splt
)
5070 bfd_vma plt0_offset
= h
->plt
.offset
+ plt_plt_insn_end
;
5072 /* Put relocation index. */
5073 bfd_put_32 (output_bfd
, plt_index
,
5074 plt
->contents
+ h
->plt
.offset
+ abed
->plt_reloc_offset
);
5076 /* Put offset for jmp .PLT0 and check for overflow. We don't
5077 check relocation index for overflow since branch displacement
5078 will overflow first. */
5079 if (plt0_offset
> 0x80000000)
5080 info
->callbacks
->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5081 output_bfd
, h
->root
.root
.string
);
5082 bfd_put_32 (output_bfd
, - plt0_offset
,
5083 plt
->contents
+ h
->plt
.offset
+ plt_plt_offset
);
5086 bed
= get_elf_backend_data (output_bfd
);
5087 loc
= relplt
->contents
+ plt_index
* bed
->s
->sizeof_rela
;
5088 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
5090 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5092 bfd_vma got_offset
, plt_offset
, plt_got_offset
, plt_got_insn_size
;
5093 asection
*plt
, *got
;
5094 bfd_boolean got_after_plt
;
5095 int32_t got_pcrel_offset
;
5096 const bfd_byte
*got_plt_entry
;
5098 /* Set the entry in the GOT procedure linkage table. */
5099 plt
= htab
->plt_got
;
5100 got
= htab
->elf
.sgot
;
5101 got_offset
= h
->got
.offset
;
5103 if (got_offset
== (bfd_vma
) -1
5104 || h
->type
== STT_GNU_IFUNC
5109 /* Use the second PLT entry template for the GOT PLT since they
5110 are the identical. */
5111 plt_got_insn_size
= elf_x86_64_bnd_arch_bed
.plt_got_insn_size
;
5112 plt_got_offset
= elf_x86_64_bnd_arch_bed
.plt_got_offset
;
5113 if (eh
->has_bnd_reloc
)
5114 got_plt_entry
= elf_x86_64_bnd_plt2_entry
;
5117 got_plt_entry
= elf_x86_64_legacy_plt2_entry
;
5119 /* Subtract 1 since there is no BND prefix. */
5120 plt_got_insn_size
-= 1;
5121 plt_got_offset
-= 1;
5124 /* Fill in the entry in the GOT procedure linkage table. */
5125 plt_offset
= eh
->plt_got
.offset
;
5126 memcpy (plt
->contents
+ plt_offset
,
5127 got_plt_entry
, sizeof (elf_x86_64_legacy_plt2_entry
));
5129 /* Put offset the PC-relative instruction referring to the GOT
5130 entry, subtracting the size of that instruction. */
5131 got_pcrel_offset
= (got
->output_section
->vma
5132 + got
->output_offset
5134 - plt
->output_section
->vma
5135 - plt
->output_offset
5137 - plt_got_insn_size
);
5139 /* Check PC-relative offset overflow in GOT PLT entry. */
5140 got_after_plt
= got
->output_section
->vma
> plt
->output_section
->vma
;
5141 if ((got_after_plt
&& got_pcrel_offset
< 0)
5142 || (!got_after_plt
&& got_pcrel_offset
> 0))
5143 info
->callbacks
->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5144 output_bfd
, h
->root
.root
.string
);
5146 bfd_put_32 (output_bfd
, got_pcrel_offset
,
5147 plt
->contents
+ plt_offset
+ plt_got_offset
);
5151 && (h
->plt
.offset
!= (bfd_vma
) -1
5152 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5154 /* Mark the symbol as undefined, rather than as defined in
5155 the .plt section. Leave the value if there were any
5156 relocations where pointer equality matters (this is a clue
5157 for the dynamic linker, to make function pointer
5158 comparisons work between an application and shared
5159 library), otherwise set it to zero. If a function is only
5160 called from a binary, there is no need to slow down
5161 shared libraries because of that. */
5162 sym
->st_shndx
= SHN_UNDEF
;
5163 if (!h
->pointer_equality_needed
)
5167 if (h
->got
.offset
!= (bfd_vma
) -1
5168 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h
)->tls_type
)
5169 && elf_x86_64_hash_entry (h
)->tls_type
!= GOT_TLS_IE
)
5171 Elf_Internal_Rela rela
;
5173 /* This symbol has an entry in the global offset table. Set it
5175 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5178 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5179 + htab
->elf
.sgot
->output_offset
5180 + (h
->got
.offset
&~ (bfd_vma
) 1));
5182 /* If this is a static link, or it is a -Bsymbolic link and the
5183 symbol is defined locally or was forced to be local because
5184 of a version file, we just want to emit a RELATIVE reloc.
5185 The entry in the global offset table will already have been
5186 initialized in the relocate_section function. */
5188 && h
->type
== STT_GNU_IFUNC
)
5192 /* Generate R_X86_64_GLOB_DAT. */
5199 if (!h
->pointer_equality_needed
)
5202 /* For non-shared object, we can't use .got.plt, which
5203 contains the real function addres if we need pointer
5204 equality. We load the GOT entry with the PLT entry. */
5205 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5206 bfd_put_64 (output_bfd
, (plt
->output_section
->vma
5207 + plt
->output_offset
5209 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5213 else if (info
->shared
5214 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5216 if (!h
->def_regular
)
5218 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5219 rela
.r_info
= htab
->r_info (0, R_X86_64_RELATIVE
);
5220 rela
.r_addend
= (h
->root
.u
.def
.value
5221 + h
->root
.u
.def
.section
->output_section
->vma
5222 + h
->root
.u
.def
.section
->output_offset
);
5226 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5228 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5229 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5230 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_GLOB_DAT
);
5234 elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &rela
);
5239 Elf_Internal_Rela rela
;
5241 /* This symbol needs a copy reloc. Set it up. */
5243 if (h
->dynindx
== -1
5244 || (h
->root
.type
!= bfd_link_hash_defined
5245 && h
->root
.type
!= bfd_link_hash_defweak
)
5246 || htab
->srelbss
== NULL
)
5249 rela
.r_offset
= (h
->root
.u
.def
.value
5250 + h
->root
.u
.def
.section
->output_section
->vma
5251 + h
->root
.u
.def
.section
->output_offset
);
5252 rela
.r_info
= htab
->r_info (h
->dynindx
, R_X86_64_COPY
);
5254 elf_append_rela (output_bfd
, htab
->srelbss
, &rela
);
5260 /* Finish up local dynamic symbol handling. We set the contents of
5261 various dynamic sections here. */
5264 elf_x86_64_finish_local_dynamic_symbol (void **slot
, void *inf
)
5266 struct elf_link_hash_entry
*h
5267 = (struct elf_link_hash_entry
*) *slot
;
5268 struct bfd_link_info
*info
5269 = (struct bfd_link_info
*) inf
;
5271 return elf_x86_64_finish_dynamic_symbol (info
->output_bfd
,
5275 /* Used to decide how to sort relocs in an optimal manner for the
5276 dynamic linker, before writing them out. */
5278 static enum elf_reloc_type_class
5279 elf_x86_64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5280 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5281 const Elf_Internal_Rela
*rela
)
5283 switch ((int) ELF32_R_TYPE (rela
->r_info
))
5285 case R_X86_64_RELATIVE
:
5286 case R_X86_64_RELATIVE64
:
5287 return reloc_class_relative
;
5288 case R_X86_64_JUMP_SLOT
:
5289 return reloc_class_plt
;
5291 return reloc_class_copy
;
5293 return reloc_class_normal
;
5297 /* Finish up the dynamic sections. */
5300 elf_x86_64_finish_dynamic_sections (bfd
*output_bfd
,
5301 struct bfd_link_info
*info
)
5303 struct elf_x86_64_link_hash_table
*htab
;
5306 const struct elf_x86_64_backend_data
*abed
;
5308 htab
= elf_x86_64_hash_table (info
);
5312 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5313 section only if there is .plt section. */
5314 abed
= (htab
->elf
.splt
!= NULL
&& htab
->plt_bnd
!= NULL
5315 ? &elf_x86_64_bnd_arch_bed
5316 : get_elf_x86_64_backend_data (output_bfd
));
5318 dynobj
= htab
->elf
.dynobj
;
5319 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5321 if (htab
->elf
.dynamic_sections_created
)
5323 bfd_byte
*dyncon
, *dynconend
;
5324 const struct elf_backend_data
*bed
;
5325 bfd_size_type sizeof_dyn
;
5327 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5330 bed
= get_elf_backend_data (dynobj
);
5331 sizeof_dyn
= bed
->s
->sizeof_dyn
;
5332 dyncon
= sdyn
->contents
;
5333 dynconend
= sdyn
->contents
+ sdyn
->size
;
5334 for (; dyncon
< dynconend
; dyncon
+= sizeof_dyn
)
5336 Elf_Internal_Dyn dyn
;
5339 (*bed
->s
->swap_dyn_in
) (dynobj
, dyncon
, &dyn
);
5347 s
= htab
->elf
.sgotplt
;
5348 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5352 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
5356 s
= htab
->elf
.srelplt
->output_section
;
5357 dyn
.d_un
.d_val
= s
->size
;
5361 /* The procedure linkage table relocs (DT_JMPREL) should
5362 not be included in the overall relocs (DT_RELA).
5363 Therefore, we override the DT_RELASZ entry here to
5364 make it not include the JMPREL relocs. Since the
5365 linker script arranges for .rela.plt to follow all
5366 other relocation sections, we don't have to worry
5367 about changing the DT_RELA entry. */
5368 if (htab
->elf
.srelplt
!= NULL
)
5370 s
= htab
->elf
.srelplt
->output_section
;
5371 dyn
.d_un
.d_val
-= s
->size
;
5375 case DT_TLSDESC_PLT
:
5377 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5378 + htab
->tlsdesc_plt
;
5381 case DT_TLSDESC_GOT
:
5383 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
5384 + htab
->tlsdesc_got
;
5388 (*bed
->s
->swap_dyn_out
) (output_bfd
, &dyn
, dyncon
);
5391 /* Fill in the special first entry in the procedure linkage table. */
5392 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5394 /* Fill in the first entry in the procedure linkage table. */
5395 memcpy (htab
->elf
.splt
->contents
,
5396 abed
->plt0_entry
, abed
->plt_entry_size
);
5397 /* Add offset for pushq GOT+8(%rip), since the instruction
5398 uses 6 bytes subtract this value. */
5399 bfd_put_32 (output_bfd
,
5400 (htab
->elf
.sgotplt
->output_section
->vma
5401 + htab
->elf
.sgotplt
->output_offset
5403 - htab
->elf
.splt
->output_section
->vma
5404 - htab
->elf
.splt
->output_offset
5406 htab
->elf
.splt
->contents
+ abed
->plt0_got1_offset
);
5407 /* Add offset for the PC-relative instruction accessing GOT+16,
5408 subtracting the offset to the end of that instruction. */
5409 bfd_put_32 (output_bfd
,
5410 (htab
->elf
.sgotplt
->output_section
->vma
5411 + htab
->elf
.sgotplt
->output_offset
5413 - htab
->elf
.splt
->output_section
->vma
5414 - htab
->elf
.splt
->output_offset
5415 - abed
->plt0_got2_insn_end
),
5416 htab
->elf
.splt
->contents
+ abed
->plt0_got2_offset
);
5418 elf_section_data (htab
->elf
.splt
->output_section
)
5419 ->this_hdr
.sh_entsize
= abed
->plt_entry_size
;
5421 if (htab
->tlsdesc_plt
)
5423 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
5424 htab
->elf
.sgot
->contents
+ htab
->tlsdesc_got
);
5426 memcpy (htab
->elf
.splt
->contents
+ htab
->tlsdesc_plt
,
5427 abed
->plt0_entry
, abed
->plt_entry_size
);
5429 /* Add offset for pushq GOT+8(%rip), since the
5430 instruction uses 6 bytes subtract this value. */
5431 bfd_put_32 (output_bfd
,
5432 (htab
->elf
.sgotplt
->output_section
->vma
5433 + htab
->elf
.sgotplt
->output_offset
5435 - htab
->elf
.splt
->output_section
->vma
5436 - htab
->elf
.splt
->output_offset
5439 htab
->elf
.splt
->contents
5440 + htab
->tlsdesc_plt
+ abed
->plt0_got1_offset
);
5441 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5442 where TGD stands for htab->tlsdesc_got, subtracting the offset
5443 to the end of that instruction. */
5444 bfd_put_32 (output_bfd
,
5445 (htab
->elf
.sgot
->output_section
->vma
5446 + htab
->elf
.sgot
->output_offset
5448 - htab
->elf
.splt
->output_section
->vma
5449 - htab
->elf
.splt
->output_offset
5451 - abed
->plt0_got2_insn_end
),
5452 htab
->elf
.splt
->contents
5453 + htab
->tlsdesc_plt
+ abed
->plt0_got2_offset
);
5458 if (htab
->plt_bnd
!= NULL
)
5459 elf_section_data (htab
->plt_bnd
->output_section
)
5460 ->this_hdr
.sh_entsize
= sizeof (elf_x86_64_bnd_plt2_entry
);
5462 if (htab
->elf
.sgotplt
)
5464 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5466 (*_bfd_error_handler
)
5467 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5471 /* Fill in the first three entries in the global offset table. */
5472 if (htab
->elf
.sgotplt
->size
> 0)
5474 /* Set the first entry in the global offset table to the address of
5475 the dynamic section. */
5477 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
);
5479 bfd_put_64 (output_bfd
,
5480 sdyn
->output_section
->vma
+ sdyn
->output_offset
,
5481 htab
->elf
.sgotplt
->contents
);
5482 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5483 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
5484 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
*2);
5487 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
=
5491 /* Adjust .eh_frame for .plt section. */
5492 if (htab
->plt_eh_frame
!= NULL
5493 && htab
->plt_eh_frame
->contents
!= NULL
)
5495 if (htab
->elf
.splt
!= NULL
5496 && htab
->elf
.splt
->size
!= 0
5497 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5498 && htab
->elf
.splt
->output_section
!= NULL
5499 && htab
->plt_eh_frame
->output_section
!= NULL
)
5501 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5502 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5503 + htab
->plt_eh_frame
->output_offset
5504 + PLT_FDE_START_OFFSET
;
5505 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5506 htab
->plt_eh_frame
->contents
5507 + PLT_FDE_START_OFFSET
);
5509 if (htab
->plt_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5511 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5513 htab
->plt_eh_frame
->contents
))
5518 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5519 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
5522 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5523 htab_traverse (htab
->loc_hash_table
,
5524 elf_x86_64_finish_local_dynamic_symbol
,
5530 /* Return an array of PLT entry symbol values. */
5533 elf_x86_64_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5536 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5539 bfd_vma
*plt_sym_val
;
5541 bfd_byte
*plt_contents
;
5542 const struct elf_x86_64_backend_data
*bed
;
5543 Elf_Internal_Shdr
*hdr
;
5546 /* Get the .plt section contents. PLT passed down may point to the
5547 .plt.bnd section. Make sure that PLT always points to the .plt
5549 plt_bnd
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5554 plt
= bfd_get_section_by_name (abfd
, ".plt");
5557 bed
= &elf_x86_64_bnd_arch_bed
;
5560 bed
= get_elf_x86_64_backend_data (abfd
);
5562 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5563 if (plt_contents
== NULL
)
5565 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5566 plt_contents
, 0, plt
->size
))
5569 free (plt_contents
);
5573 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5574 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5577 hdr
= &elf_section_data (relplt
)->this_hdr
;
5578 count
= relplt
->size
/ hdr
->sh_entsize
;
5580 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5581 if (plt_sym_val
== NULL
)
5584 for (i
= 0; i
< count
; i
++)
5585 plt_sym_val
[i
] = -1;
5587 plt_offset
= bed
->plt_entry_size
;
5588 p
= relplt
->relocation
;
5589 for (i
= 0; i
< count
; i
++, p
++)
5593 /* Skip unknown relocation. */
5594 if (p
->howto
== NULL
)
5597 if (p
->howto
->type
!= R_X86_64_JUMP_SLOT
5598 && p
->howto
->type
!= R_X86_64_IRELATIVE
)
5601 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5602 + bed
->plt_reloc_offset
));
5603 if (reloc_index
>= count
)
5607 /* This is the index in .plt section. */
5608 long plt_index
= plt_offset
/ bed
->plt_entry_size
;
5609 /* Store VMA + the offset in .plt.bnd section. */
5610 plt_sym_val
[reloc_index
] =
5612 + (plt_index
- 1) * sizeof (elf_x86_64_legacy_plt2_entry
));
5615 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5616 plt_offset
+= bed
->plt_entry_size
;
5619 free (plt_contents
);
5624 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5628 elf_x86_64_get_synthetic_symtab (bfd
*abfd
,
5635 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
5636 as PLT if it exists. */
5637 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt.bnd");
5639 plt
= bfd_get_section_by_name (abfd
, ".plt");
5640 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5641 dynsymcount
, dynsyms
, ret
,
5643 elf_x86_64_get_plt_sym_val
);
5646 /* Handle an x86-64 specific section when reading an object file. This
5647 is called when elfcode.h finds a section with an unknown type. */
5650 elf_x86_64_section_from_shdr (bfd
*abfd
, Elf_Internal_Shdr
*hdr
,
5651 const char *name
, int shindex
)
5653 if (hdr
->sh_type
!= SHT_X86_64_UNWIND
)
5656 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
5662 /* Hook called by the linker routine which adds symbols from an object
5663 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5667 elf_x86_64_add_symbol_hook (bfd
*abfd
,
5668 struct bfd_link_info
*info
,
5669 Elf_Internal_Sym
*sym
,
5670 const char **namep ATTRIBUTE_UNUSED
,
5671 flagword
*flagsp ATTRIBUTE_UNUSED
,
5677 switch (sym
->st_shndx
)
5679 case SHN_X86_64_LCOMMON
:
5680 lcomm
= bfd_get_section_by_name (abfd
, "LARGE_COMMON");
5683 lcomm
= bfd_make_section_with_flags (abfd
,
5687 | SEC_LINKER_CREATED
));
5690 elf_section_flags (lcomm
) |= SHF_X86_64_LARGE
;
5693 *valp
= sym
->st_size
;
5697 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5698 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5699 && (abfd
->flags
& DYNAMIC
) == 0
5700 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5701 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5707 /* Given a BFD section, try to locate the corresponding ELF section
5711 elf_x86_64_elf_section_from_bfd_section (bfd
*abfd ATTRIBUTE_UNUSED
,
5712 asection
*sec
, int *index_return
)
5714 if (sec
== &_bfd_elf_large_com_section
)
5716 *index_return
= SHN_X86_64_LCOMMON
;
5722 /* Process a symbol. */
5725 elf_x86_64_symbol_processing (bfd
*abfd ATTRIBUTE_UNUSED
,
5728 elf_symbol_type
*elfsym
= (elf_symbol_type
*) asym
;
5730 switch (elfsym
->internal_elf_sym
.st_shndx
)
5732 case SHN_X86_64_LCOMMON
:
5733 asym
->section
= &_bfd_elf_large_com_section
;
5734 asym
->value
= elfsym
->internal_elf_sym
.st_size
;
5735 /* Common symbol doesn't set BSF_GLOBAL. */
5736 asym
->flags
&= ~BSF_GLOBAL
;
5742 elf_x86_64_common_definition (Elf_Internal_Sym
*sym
)
5744 return (sym
->st_shndx
== SHN_COMMON
5745 || sym
->st_shndx
== SHN_X86_64_LCOMMON
);
5749 elf_x86_64_common_section_index (asection
*sec
)
5751 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5754 return SHN_X86_64_LCOMMON
;
5758 elf_x86_64_common_section (asection
*sec
)
5760 if ((elf_section_flags (sec
) & SHF_X86_64_LARGE
) == 0)
5761 return bfd_com_section_ptr
;
5763 return &_bfd_elf_large_com_section
;
5767 elf_x86_64_merge_symbol (struct elf_link_hash_entry
*h
,
5768 const Elf_Internal_Sym
*sym
,
5773 const asection
*oldsec
)
5775 /* A normal common symbol and a large common symbol result in a
5776 normal common symbol. We turn the large common symbol into a
5779 && h
->root
.type
== bfd_link_hash_common
5781 && bfd_is_com_section (*psec
)
5784 if (sym
->st_shndx
== SHN_COMMON
5785 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) != 0)
5787 h
->root
.u
.c
.p
->section
5788 = bfd_make_section_old_way (oldbfd
, "COMMON");
5789 h
->root
.u
.c
.p
->section
->flags
= SEC_ALLOC
;
5791 else if (sym
->st_shndx
== SHN_X86_64_LCOMMON
5792 && (elf_section_flags (oldsec
) & SHF_X86_64_LARGE
) == 0)
5793 *psec
= bfd_com_section_ptr
;
5800 elf_x86_64_additional_program_headers (bfd
*abfd
,
5801 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
5806 /* Check to see if we need a large readonly segment. */
5807 s
= bfd_get_section_by_name (abfd
, ".lrodata");
5808 if (s
&& (s
->flags
& SEC_LOAD
))
5811 /* Check to see if we need a large data segment. Since .lbss sections
5812 is placed right after the .bss section, there should be no need for
5813 a large data segment just because of .lbss. */
5814 s
= bfd_get_section_by_name (abfd
, ".ldata");
5815 if (s
&& (s
->flags
& SEC_LOAD
))
5821 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5824 elf_x86_64_hash_symbol (struct elf_link_hash_entry
*h
)
5826 if (h
->plt
.offset
!= (bfd_vma
) -1
5828 && !h
->pointer_equality_needed
)
5831 return _bfd_elf_hash_symbol (h
);
5834 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5837 elf_x86_64_relocs_compatible (const bfd_target
*input
,
5838 const bfd_target
*output
)
5840 return ((xvec_get_elf_backend_data (input
)->s
->elfclass
5841 == xvec_get_elf_backend_data (output
)->s
->elfclass
)
5842 && _bfd_elf_relocs_compatible (input
, output
));
5845 static const struct bfd_elf_special_section
5846 elf_x86_64_special_sections
[]=
5848 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5849 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5850 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
+ SHF_X86_64_LARGE
},
5851 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5852 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_X86_64_LARGE
},
5853 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_X86_64_LARGE
},
5854 { NULL
, 0, 0, 0, 0 }
5857 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5858 #define TARGET_LITTLE_NAME "elf64-x86-64"
5859 #define ELF_ARCH bfd_arch_i386
5860 #define ELF_TARGET_ID X86_64_ELF_DATA
5861 #define ELF_MACHINE_CODE EM_X86_64
5862 #define ELF_MAXPAGESIZE 0x200000
5863 #define ELF_MINPAGESIZE 0x1000
5864 #define ELF_COMMONPAGESIZE 0x1000
5866 #define elf_backend_can_gc_sections 1
5867 #define elf_backend_can_refcount 1
5868 #define elf_backend_want_got_plt 1
5869 #define elf_backend_plt_readonly 1
5870 #define elf_backend_want_plt_sym 0
5871 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5872 #define elf_backend_rela_normal 1
5873 #define elf_backend_plt_alignment 4
5874 #define elf_backend_extern_protected_data 1
5876 #define elf_info_to_howto elf_x86_64_info_to_howto
5878 #define bfd_elf64_bfd_link_hash_table_create \
5879 elf_x86_64_link_hash_table_create
5880 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5881 #define bfd_elf64_bfd_reloc_name_lookup \
5882 elf_x86_64_reloc_name_lookup
5884 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5885 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5886 #define elf_backend_check_relocs elf_x86_64_check_relocs
5887 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5888 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5889 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5890 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5891 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5892 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5893 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5894 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5896 #define elf_backend_write_core_note elf_x86_64_write_core_note
5898 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5899 #define elf_backend_relocate_section elf_x86_64_relocate_section
5900 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5901 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5902 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5903 #define elf_backend_object_p elf64_x86_64_elf_object_p
5904 #define bfd_elf64_mkobject elf_x86_64_mkobject
5905 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5907 #define elf_backend_section_from_shdr \
5908 elf_x86_64_section_from_shdr
5910 #define elf_backend_section_from_bfd_section \
5911 elf_x86_64_elf_section_from_bfd_section
5912 #define elf_backend_add_symbol_hook \
5913 elf_x86_64_add_symbol_hook
5914 #define elf_backend_symbol_processing \
5915 elf_x86_64_symbol_processing
5916 #define elf_backend_common_section_index \
5917 elf_x86_64_common_section_index
5918 #define elf_backend_common_section \
5919 elf_x86_64_common_section
5920 #define elf_backend_common_definition \
5921 elf_x86_64_common_definition
5922 #define elf_backend_merge_symbol \
5923 elf_x86_64_merge_symbol
5924 #define elf_backend_special_sections \
5925 elf_x86_64_special_sections
5926 #define elf_backend_additional_program_headers \
5927 elf_x86_64_additional_program_headers
5928 #define elf_backend_hash_symbol \
5929 elf_x86_64_hash_symbol
5931 #include "elf64-target.h"
5933 /* CloudABI support. */
5935 #undef TARGET_LITTLE_SYM
5936 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5937 #undef TARGET_LITTLE_NAME
5938 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5941 #define ELF_OSABI ELFOSABI_CLOUDABI
5944 #define elf64_bed elf64_x86_64_cloudabi_bed
5946 #include "elf64-target.h"
5948 /* FreeBSD support. */
5950 #undef TARGET_LITTLE_SYM
5951 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5952 #undef TARGET_LITTLE_NAME
5953 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5956 #define ELF_OSABI ELFOSABI_FREEBSD
5959 #define elf64_bed elf64_x86_64_fbsd_bed
5961 #include "elf64-target.h"
5963 /* Solaris 2 support. */
5965 #undef TARGET_LITTLE_SYM
5966 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5967 #undef TARGET_LITTLE_NAME
5968 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5970 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5971 objects won't be recognized. */
5975 #define elf64_bed elf64_x86_64_sol2_bed
5977 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5979 #undef elf_backend_static_tls_alignment
5980 #define elf_backend_static_tls_alignment 16
5982 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5984 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5986 #undef elf_backend_want_plt_sym
5987 #define elf_backend_want_plt_sym 1
5989 #include "elf64-target.h"
5991 /* Native Client support. */
5994 elf64_x86_64_nacl_elf_object_p (bfd
*abfd
)
5996 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5997 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x86_64_nacl
);
6001 #undef TARGET_LITTLE_SYM
6002 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6003 #undef TARGET_LITTLE_NAME
6004 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6006 #define elf64_bed elf64_x86_64_nacl_bed
6008 #undef ELF_MAXPAGESIZE
6009 #undef ELF_MINPAGESIZE
6010 #undef ELF_COMMONPAGESIZE
6011 #define ELF_MAXPAGESIZE 0x10000
6012 #define ELF_MINPAGESIZE 0x10000
6013 #define ELF_COMMONPAGESIZE 0x10000
6015 /* Restore defaults. */
6017 #undef elf_backend_static_tls_alignment
6018 #undef elf_backend_want_plt_sym
6019 #define elf_backend_want_plt_sym 0
6021 /* NaCl uses substantially different PLT entries for the same effects. */
6023 #undef elf_backend_plt_alignment
6024 #define elf_backend_plt_alignment 5
6025 #define NACL_PLT_ENTRY_SIZE 64
6026 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6028 static const bfd_byte elf_x86_64_nacl_plt0_entry
[NACL_PLT_ENTRY_SIZE
] =
6030 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6031 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6032 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6033 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6034 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6036 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6037 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6039 /* 32 bytes of nop to pad out to the standard size. */
6040 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6041 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6042 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6043 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6044 0x66, /* excess data32 prefix */
6048 static const bfd_byte elf_x86_64_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6050 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6051 0x41, 0x83, 0xe3, NACLMASK
, /* and $-32, %r11d */
6052 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6053 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6055 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6056 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6057 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6059 /* Lazy GOT entries point here (32-byte aligned). */
6060 0x68, /* pushq immediate */
6061 0, 0, 0, 0, /* replaced with index into relocation table. */
6062 0xe9, /* jmp relative */
6063 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6065 /* 22 bytes of nop to pad out to the standard size. */
6066 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6067 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6068 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6071 /* .eh_frame covering the .plt section. */
6073 static const bfd_byte elf_x86_64_nacl_eh_frame_plt
[] =
6075 #if (PLT_CIE_LENGTH != 20 \
6076 || PLT_FDE_LENGTH != 36 \
6077 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6078 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6079 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6081 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6082 0, 0, 0, 0, /* CIE ID */
6083 1, /* CIE version */
6084 'z', 'R', 0, /* Augmentation string */
6085 1, /* Code alignment factor */
6086 0x78, /* Data alignment factor */
6087 16, /* Return address column */
6088 1, /* Augmentation size */
6089 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6090 DW_CFA_def_cfa
, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6091 DW_CFA_offset
+ 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6092 DW_CFA_nop
, DW_CFA_nop
,
6094 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6095 PLT_CIE_LENGTH
+ 8, 0, 0, 0,/* CIE pointer */
6096 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6097 0, 0, 0, 0, /* .plt size goes here */
6098 0, /* Augmentation size */
6099 DW_CFA_def_cfa_offset
, 16, /* DW_CFA_def_cfa_offset: 16 */
6100 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6101 DW_CFA_def_cfa_offset
, 24, /* DW_CFA_def_cfa_offset: 24 */
6102 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6103 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6104 13, /* Block length */
6105 DW_OP_breg7
, 8, /* DW_OP_breg7 (rsp): 8 */
6106 DW_OP_breg16
, 0, /* DW_OP_breg16 (rip): 0 */
6107 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6108 DW_OP_lit3
, DW_OP_shl
, DW_OP_plus
,
6109 DW_CFA_nop
, DW_CFA_nop
6112 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed
=
6114 elf_x86_64_nacl_plt0_entry
, /* plt0_entry */
6115 elf_x86_64_nacl_plt_entry
, /* plt_entry */
6116 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6117 2, /* plt0_got1_offset */
6118 9, /* plt0_got2_offset */
6119 13, /* plt0_got2_insn_end */
6120 3, /* plt_got_offset */
6121 33, /* plt_reloc_offset */
6122 38, /* plt_plt_offset */
6123 7, /* plt_got_insn_size */
6124 42, /* plt_plt_insn_end */
6125 32, /* plt_lazy_offset */
6126 elf_x86_64_nacl_eh_frame_plt
, /* eh_frame_plt */
6127 sizeof (elf_x86_64_nacl_eh_frame_plt
), /* eh_frame_plt_size */
6130 #undef elf_backend_arch_data
6131 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6133 #undef elf_backend_object_p
6134 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6135 #undef elf_backend_modify_segment_map
6136 #define elf_backend_modify_segment_map nacl_modify_segment_map
6137 #undef elf_backend_modify_program_headers
6138 #define elf_backend_modify_program_headers nacl_modify_program_headers
6139 #undef elf_backend_final_write_processing
6140 #define elf_backend_final_write_processing nacl_final_write_processing
6142 #include "elf64-target.h"
6144 /* Native Client x32 support. */
6147 elf32_x86_64_nacl_elf_object_p (bfd
*abfd
)
6149 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6150 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_x64_32_nacl
);
6154 #undef TARGET_LITTLE_SYM
6155 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6156 #undef TARGET_LITTLE_NAME
6157 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6159 #define elf32_bed elf32_x86_64_nacl_bed
6161 #define bfd_elf32_bfd_link_hash_table_create \
6162 elf_x86_64_link_hash_table_create
6163 #define bfd_elf32_bfd_reloc_type_lookup \
6164 elf_x86_64_reloc_type_lookup
6165 #define bfd_elf32_bfd_reloc_name_lookup \
6166 elf_x86_64_reloc_name_lookup
6167 #define bfd_elf32_mkobject \
6169 #define bfd_elf32_get_synthetic_symtab \
6170 elf_x86_64_get_synthetic_symtab
6172 #undef elf_backend_object_p
6173 #define elf_backend_object_p \
6174 elf32_x86_64_nacl_elf_object_p
6176 #undef elf_backend_bfd_from_remote_memory
6177 #define elf_backend_bfd_from_remote_memory \
6178 _bfd_elf32_bfd_from_remote_memory
6180 #undef elf_backend_size_info
6181 #define elf_backend_size_info \
6182 _bfd_elf32_size_info
6184 #include "elf32-target.h"
6186 /* Restore defaults. */
6187 #undef elf_backend_object_p
6188 #define elf_backend_object_p elf64_x86_64_elf_object_p
6189 #undef elf_backend_bfd_from_remote_memory
6190 #undef elf_backend_size_info
6191 #undef elf_backend_modify_segment_map
6192 #undef elf_backend_modify_program_headers
6193 #undef elf_backend_final_write_processing
6195 /* Intel L1OM support. */
6198 elf64_l1om_elf_object_p (bfd
*abfd
)
6200 /* Set the right machine number for an L1OM elf64 file. */
6201 bfd_default_set_arch_mach (abfd
, bfd_arch_l1om
, bfd_mach_l1om
);
6205 #undef TARGET_LITTLE_SYM
6206 #define TARGET_LITTLE_SYM l1om_elf64_vec
6207 #undef TARGET_LITTLE_NAME
6208 #define TARGET_LITTLE_NAME "elf64-l1om"
6210 #define ELF_ARCH bfd_arch_l1om
6212 #undef ELF_MACHINE_CODE
6213 #define ELF_MACHINE_CODE EM_L1OM
6218 #define elf64_bed elf64_l1om_bed
6220 #undef elf_backend_object_p
6221 #define elf_backend_object_p elf64_l1om_elf_object_p
6223 /* Restore defaults. */
6224 #undef ELF_MAXPAGESIZE
6225 #undef ELF_MINPAGESIZE
6226 #undef ELF_COMMONPAGESIZE
6227 #define ELF_MAXPAGESIZE 0x200000
6228 #define ELF_MINPAGESIZE 0x1000
6229 #define ELF_COMMONPAGESIZE 0x1000
6230 #undef elf_backend_plt_alignment
6231 #define elf_backend_plt_alignment 4
6232 #undef elf_backend_arch_data
6233 #define elf_backend_arch_data &elf_x86_64_arch_bed
6235 #include "elf64-target.h"
6237 /* FreeBSD L1OM support. */
6239 #undef TARGET_LITTLE_SYM
6240 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6241 #undef TARGET_LITTLE_NAME
6242 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6245 #define ELF_OSABI ELFOSABI_FREEBSD
6248 #define elf64_bed elf64_l1om_fbsd_bed
6250 #include "elf64-target.h"
6252 /* Intel K1OM support. */
6255 elf64_k1om_elf_object_p (bfd
*abfd
)
6257 /* Set the right machine number for an K1OM elf64 file. */
6258 bfd_default_set_arch_mach (abfd
, bfd_arch_k1om
, bfd_mach_k1om
);
6262 #undef TARGET_LITTLE_SYM
6263 #define TARGET_LITTLE_SYM k1om_elf64_vec
6264 #undef TARGET_LITTLE_NAME
6265 #define TARGET_LITTLE_NAME "elf64-k1om"
6267 #define ELF_ARCH bfd_arch_k1om
6269 #undef ELF_MACHINE_CODE
6270 #define ELF_MACHINE_CODE EM_K1OM
6275 #define elf64_bed elf64_k1om_bed
6277 #undef elf_backend_object_p
6278 #define elf_backend_object_p elf64_k1om_elf_object_p
6280 #undef elf_backend_static_tls_alignment
6282 #undef elf_backend_want_plt_sym
6283 #define elf_backend_want_plt_sym 0
6285 #include "elf64-target.h"
6287 /* FreeBSD K1OM support. */
6289 #undef TARGET_LITTLE_SYM
6290 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6291 #undef TARGET_LITTLE_NAME
6292 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6295 #define ELF_OSABI ELFOSABI_FREEBSD
6298 #define elf64_bed elf64_k1om_fbsd_bed
6300 #include "elf64-target.h"
6302 /* 32bit x86-64 support. */
6304 #undef TARGET_LITTLE_SYM
6305 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6306 #undef TARGET_LITTLE_NAME
6307 #define TARGET_LITTLE_NAME "elf32-x86-64"
6311 #define ELF_ARCH bfd_arch_i386
6313 #undef ELF_MACHINE_CODE
6314 #define ELF_MACHINE_CODE EM_X86_64
6318 #undef elf_backend_object_p
6319 #define elf_backend_object_p \
6320 elf32_x86_64_elf_object_p
6322 #undef elf_backend_bfd_from_remote_memory
6323 #define elf_backend_bfd_from_remote_memory \
6324 _bfd_elf32_bfd_from_remote_memory
6326 #undef elf_backend_size_info
6327 #define elf_backend_size_info \
6328 _bfd_elf32_size_info
6330 #include "elf32-target.h"